Science Diet Dog Food

The Science Diet Dog Food Review: Tested & Evaluated 2024

Written By Eloisa Thomas | Canine Coach, Double M.A in Anthropology.
Edited & Fact Checked By Renae Soppe | B.A Journalism & Science. 
Last Updated: 18th January 2024

Are you looking for a non-biased Science Diet dog food review?

Today, our experts dive deep into this brand to figure out whether or not it's a good option for your pup. Our team worked with other authorities to test and study this dog food, and here's everything you need to know about Hill's dog food. Let's dive in!

  • This dog food is made in the United States, following AAFCO’s guidelines
  • They offer both kibble and canned food options
  • All recipes include cereals within the first five ingredients

Quick Pick - Our Best Rated Dog Food

Petzyo Dog Food

Our Number 1 Pick
Petzyo Dog Food

  • Ethically sourced Kangaroo, Chicken or Salmon, sweet potato & superfood extras
  • Iron-rich & low fat proteins
  • Three Omega-3 and -6 rich oils with a well balanced 11% fat content
  • Made in Australia

Australia's Hill’s Science Diet Dog Food Reviewed

Science Diet - Overall 3 Star Rating

  • Ingredients: Chicken, Whole Grain Wheat, Powdered Cellulose, Brown Rice, Whole Grain Corn, Corn Gluten Meal, Chicken Fat, Cracked Pearled Barley, Chicken Meal, Whole Grain Sorghum, Wheat Gluten, Chicken Liver flavour, Soybean Mill Run, Pork Liver flavour, Soybean Oil, Lactic Acid, Fish Oil, Potassium Chloride, Calcium Carbonate, Iodized Salt, Choline Chloride, vitamins (Vitamin E Supplement, L-Ascorbyl-2-Polyphosphate (source of Vitamin C), Niacin Supplement + Plus More.
  • Named Protein First: Yes
  • Dog Food Type: Grain Inclusive & Grain Free
  • Recipe Range: Chicken, Rice & Barley or Chicken Meal & Oats or Chicken + More.
  • Suitable For: Science Diet's recipe range can be suitable for puppy, adult and senior dogs depending on the recipe
  • Cost: $$
  • Australian Owned: No

Hill's Science Diet Dog Food Review



Protein content




Taste & digestibility 4/5

Most dogs like the flavour of Hill’s Science Food, particularly the wet and canned options. The dry kibble has a mild chicken flavour, which pups appreciate. In general, dogs seem to be excited about mealtime and enjoy having this kibble as their main food.

When compared to Petzyo, which is one of our top brands for the best dog foods, the taste of this brand's dog food is also loved by dogs, so if your dog likes Petzyo, it will probably like the taste of Hill's Science Food.

When it comes to digestibility, Hill’s is in good standing. Since most of their recipes are based around corn, dog’s stool comes out firm and with a mild smell. Many owners mention their dogs do great with this brand. However, picky eaters tend to not love this kibble and prefer either the wet options or other brands altogether. 

We like that the manufacturer of this brand considered the taste that dogs would love.

However, because of the minor issues, we’re giving Hill’s Science Diet 4 out of 5 in this category.

Ingredients 3/5

It’s important to remember Hill’s offers three lines of dog food: Science Diet, Prescription Diet, and Ideal Balance. Today we’ll only cover their Science Diet line, which is a multi-purpose food aimed at maintaining dog health.

Hill’s Science Diet Australia has several recipes available, but most of them share their core ingredients. Here are the ones that make up the bulk of their dry kibble:

  • Chicken meal: this is a rendered form of chicken meat, usually with a higher protein and fat percentage because it’s been dehydrated [1]. In general, it’s good to see it as the first ingredient in any dog food.
  • Brewers rice: in spite of the name, brewers rice doesn’t come from breweries. This is the rice that isn’t aesthetically pleasing enough to be sold as is, and cannot be used as rice flour either. Some people refer to this type of rice as the "sweepings", because it generally comes from the little rice fragments that fall on the factory’s floor. Those are vacuumed, washed, and packaged to sell as pet food ingredients. While rice is easier to digest than wheat for dogs, brewers rice can have unwanted chemicals and be higher in arsenic than regular white rice. However, the AAFCO has established brewers rice has the same nutritional composition than white rice. Keep in mind some of Hill’s recipes have brown rice higher up the list, while others have more brewers rice.
  • Whole grain sorghum: this cereal tends to be within the first four ingredients in most of Hill’s Science Diet recipes. Sorghum has a similar nutritional profile to corn, meaning it’s high in carbohydrates and has a high glycaemic index that could spike your dog’s blood sugar. It also has 10% protein, so dog food manufacturers use it to bump up the total protein content. While sorghum is a lesser-known cereal, because it’s so similar to corn we’re not thrilled to see it as the base of the food.
  • Corn gluten meal: this is a corn by-product. Unlike actual corn, that at least offers some nutritional value in the form of carbs, corn gluten meal is plain gluten. It’s used to ensure kibble stays together and isn’t too crumbly. This ingredient also boosts the total protein content in the food [2].
  • Whole grain wheat: this cheap grain is used to add carbohydrates to dog food, but it has been at the centre of dog food controversy. While dogs can digest cereals (including wheat) they should only be offered in moderate quantities. Plus, dogs with a sensitive stomach, a history of food allergies or gluten intolerances shouldn’t eat food with wheat. Most of this brand’s recipes include wheat in various forms within the first seven ingredients, meaning it’s a key element in the food.

As you can see from this roundup, Hill’s Science Diet dog food is a cereal-heavy food and tends to be rich in corn. If your dog has previous food sensitivities, or is intolerant to certain foods, you should avoid the recipes that have corn or wheat within the first two ingredients, and those that have corn gluten altogether. We’d much rather see chicken and other animal protein sources within the first three ingredients.

Unlike Eureka, which has no grains and consists of about 90% meat, this dog food is not that good if you prefer ones with fewer grains or no fillers at all and if your dog needs a rich protein meal.

Surprisingly, their active dog recipe is our least favourite one. This specific option features wholegrain corn as the first ingredient, and corn gluten meal as the fourth. This means around 50% of the food is corn, one of the grains that are harder to digest.

This is a downside of their product because it is not friendly for all dogs. You can try to slowly incorporate this into your dog's meals but make sure that it won't compromise their digestive health.

However, it’s important to mention certain recipes from the Science Diet line have significantly better composition than the rest. For example, their sensitive skin and stomach recipe doesn’t have wheat at all, and has both chicken and chicken meal within the first three ingredients. This recipe does have sorghum and barley, but in general the protein percentage comes from animal sources, and it has a respectable fat content to nourish your pup.

Protein Content 3/5

Other Hill’s Science Diet reviews don’t mention the protein sources, so we’re diving deep into the ingredient list to figure out what they offer when it comes to protein.

In general, this brand has average protein content and some recipes fare better than others. Overall, you can find only two protein sources in Hill’s Science Food: lamb or chicken. However, keep in mind these aren’t limited-ingredient or single-protein recipes. As such, all recipes have chicken by-products (including the lamb flavours) and some recipes also have pork fat.

Most recipes have animal protein in "meal" form. As we’ve mentioned before, this is the official name of rendered animal protein, ground and cooked until it’s a concentrated form. The meal’s quality depends on the source, but it’s a nice ingredient to have in dog food.

PRO TIP: Hill’s dog food uses animal protein in the form of meal

This brand also adds extra animal fat to round up the nutritional profile. A higher lipid content is a welcome sight, especially when it comes from animal sources. Dogs need fat to keep their energy up and have healthy skin.

Overall, we like the protein sources in Hill’s dog food. All recipes have moderate protein content and clock in at around 26% protein. Their senior and older dog recipes have slightly less protein than the rest. In both cases, this brand stays within AAFCO’s recommended protein quantities:

PRO TIP: "[dog food] should have a minimum of 18% crude protein" – AAFCO [3].

It’s important to note most of this brand’s recipes have rice, sorghum, wheat and corn high up on the ingredient list. These cereals have respectable protein content, and as such, they are partly responsible for the total protein content in the food. Some recipes even have corn gluten meal, which reads as 100% protein when analysing the composition.

Compared to Ziwi Peak, which is an extremely protein-rich dog food, this brand has a fair protein content and sources. Also, if your dog has a very active lifestyle, this brand might not be able to keep its immune system strong and its muscles healthy.

We appreciate that this brand contains a good enough amount of protein. Also, they adjusted it according to the dogs' needs.

Given there are some good protein sources, but the total protein count is probably bumped up by the high amount of cereals, we’re giving Hill’s Science Diet 3 out of 5.

Additives 2/5

When it comes to additives, Hill’s dog food isn’t especially good. We like their vitamin and minerals, but the remaining additives are average to downright bad. Let’s start with the positives:

Instead of using a mysterious vitamin and mineral mix, this brand spells out the exact composition of their vitamins and minerals. It’s nice to see that minerals especially have been selected to improve absorption and lower the chance of issues like kidney stones. They have also added thiamine, an amino acid found in animal protein that’s essential to your dog’s health. Fibre is abundant thanks to the addition of dried beet pulp, oat fibre and some veggies like cranberries, carrots and apples.

On the other hand, some of the additives are less than desirable. First, we have several flavours towards the top of the list, including chicken liver flavour and pork liver flavour. When it comes to ingredient lists, whenever a flavour doesn’t state it’s natural, we can assume it’s artificial. Artificial flavours increases palatability but have shown to cause heightened liver activity, meaning they can be toxic over the long term [4].

Besides the artificial flavourings, there’s soybean oil and salt. While soybean oil has some good Omega-6, there are better (but more expensive) oils to keep your dog’s coat healthy. Finally, while salt is used to increase flavour, added salt isn’t healthy for dogs and shouldn’t appear on any ingredient list. Too much salt can cause kidney issues and worsen cardiovascular conditions.

We appreciate that they tried to put good additives into the ingredients, but the good ones are obviously outweighed by the bad ones. 

In general, the additives in Hill’s Science Diet aren’t especially good, so we’re taking off 3 stars.

Variety 4/5

Hill’s Science Diet Australia offers plenty of options to choose from. They have both dry kibble and canned recipes, as well as recipes tailored to your dog’s size.

Like Petzyo and other brands at this price point, there are different options that fit our pup’s life stage. While the flavours per se are pretty limited (there’s just lamb and chicken to choose from). In general, most dogs will find an appropriate Hill’s food that fits their size and taste.

A good thing about this brand is that it has formulated different food for a certain age of puppies. They put great consideration into this one.

However, if your pup can’t eat chicken, or needs to follow a grain-free diet, this brand doesn’t have what you’re looking for. Because of the lack of protein and grain-free options, we’re taking off 1 star.

Price 4/5

This is a reasonably-priced brand that fits most budgets. While it isn’t the cheapest dog food out there, many dog owners consider it a happy medium between price and quality. We like the availability of size-specific kibble, which can be difficult to find at this price point. While kibble size isn’t a big deal for medium to large dogs, if you’re trying to feed a mini or toy breed it can be difficult to make them eat larger biscuits.

However, it’s important to note this food is on the expensive side of average if you’re feeding a large pack or a very hungry dog. In those cases, make sure to look out for bundles or discounts to really get the most bang for your buck.

Still, we think this price is good enough considering the ingredients, variety of options, and quality. You just have to look for stores that can offer more than your money's worth. Compared to cheaper brands like Baxter, this option offers better dog food.

PRO TIP: If you’re feeding several dogs, make sure to keep an eye out for coupons or discounts

Hills Science Puppy Food

two nine week old english bulldogs puppies eating

Hill’s pet food Australia offers four puppy food options, all of which are kibble. There’s one recipe for all breeds, two options for small-breed pups and one large breed option.

The ingredients in their puppy recipes are very similar to the adult ones, but they are higher in fat and protein to account for your dog’s growing body. It’s nice to see the 20% fat content and 30% protein. However, keep in mind the latter comes from both animal and vegetable sources.

So, you still need to consider if your dogs have no health issues against one of these sources.

PRO TIP:  "the fat content for puppies should be rationed between 10-25% on a dry matter basis." – VCA hospitals

Since the puppy recipes share so much with the adult options, the shortcomings are similar. It’s important to note that, while animal protein is the first ingredient in all recipes, it’s followed in a close second by wheat, sorghum, corn and barley. This means this food is also carb-heavy and might not fit well with your dog if they’re sensitive to gluten.

We also recommend that you monitor the portions given to your dog to see if it satisfies their needs.

In general, Hills Science Puppy Food is a reasonable option as long as your dog can eat cereals and hasn’t shown signs of food intolerances.

Don’t buy if…

While this brand might fit many dogs, it may not be the right choice if you:

  • Want to buy from Australian brands: while some multinational pet food brands actually have manufacturers in Australia, Hill’s isn’t one of them. This food is made in Kansas, and then shipped all the way here. While this means the manufacturing process is more regulated than other local options, it also bumps up the carbon footprint of your dog’s food.
  • Have a sensitive dog: we already mentioned this brand is rich in cereals like wheat, sorghum, and corn. While most dogs can eat grains in moderate amounts, this kibble has way too much for sensitive pups. If your dog has a history of gluten sensitivity, food allergies or tends to do better on a low-grain diet, this isn’t the right brand.
  • Are looking for a grain-free diet: all Hill’s recipes have cereals within the first three ingredients, and sometimes they’re at the top of the list. There are no grain-free options at all.

The Verdict

Hill’s Science Diet dog food is an average option and good enough if your dog likes it. We’re not fans of the high amount of cereals (including wheat) in all recipes, but some flavours are better than others. The price is reasonable for most budgets and dogs seem to enjoy the flavour.

It has a better quality of ingredients compared to Baxters, too. Even if it's not as cheap, we can see that their recipe is better and healthier.

This is a good enough brand, and it could be added to your regular rotation without issues. Give it a try!

Want to read more dog food brand reviews? Check out the below:


  1. "What’s in the ingredient list?". Association of American Feed Control Officials. Retrieved November 12, 2023.
  2. Johnstone, G. October 3, 2022. "Corn in Dog Food: What You Need to Know". American Kennel Club. Retrieved November 12, 2023.
  3. "Calorie Content". Association of American Feed Control Officials. Retrieved November 12, 2023.
  4. Amin, K. A., Al-Muzafar, H. M., Abd Elsttar, A. H. (2016). "Effect of sweetener and flavoring agent on oxidative indices, liver and kidney function levels in rats". Indian Journal of Experimental Biology, 2016 Jan;54(1):56-63.
  5. Williams, K., Downing, R. "Feeding Growing Puppies". VCA Hospitals. Retrieved November 12, 2023.

Eloisa Thomas

Eloisa Thomas is Gentle Dog Trainers Canine Coach & Anthropologist.

With a double master's degree in Anthropology and awarded a Chancellor's International Scholarship to pursue a PhD in History at the University of Warwick (UK), she's well equipped to write well written and factual canine information that will actually help people understand their dogs better.

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