Science Selective Mouse & Rat Food

By Science Selective
Rated 4.7959 out of 5 stars


Selected: Size:


Selected: Size:

$18.50Chewy Price
$19.99Chewy Price
$17.58Autoship Price
Autoship (Save an extra 5%)

Why Autoship?

  • Save 5% on all future Autoship orders
  • Set your schedule based on your pet's needs
  • No fees, no commitments - skip, change or cancel anytime.

Save Extra 50% with First Autoship

See Details for instructions to redeem.
In Stock
FREE 1-3 day delivery on first-time orders over $35

About This Item


  • This tasty rat food contains fruits as apple and black currant—providing the healthy support of antioxidants and a high vitamin content to your little pal.
  • Rich in natural ingredients, this formula helps encourage a healthy coat, skin and digestive system.
  • This rat food is high in polyunsaturated fatty acids, low in saturated fatty acids, and low in cholesterol, helping to support your little buddy’s cardiovascular health!
  • Helps to promote healthy teeth, containing zero added sugar and encouraging dental wear.
  • Highly palatable and delicious, this formula is designed specifically for your rat’s nutritional needs, and is suitable for any breed.

See More

Nutritional Information

Feeding Instructions

Frequently Bought Together

This Item – Science Selective Mouse & Rat Food, 4.4-lb bag
Rated 4.7959 out of 5 stars
$18.50Chewy Price

Save Extra 50% with First Autoship

Oxbow Essentials Regal Rat Adult Rat Food, 3-lb bag
Rated 4.8148 out of 5 stars
$12.49Chewy Price

Save Extra 50% with First Autoship

Total Price: $34.28

About Supreme Pet Foods Science Selective

Science Selective

Recommended by veterinary experts, Science Selective is rich in natural ingredients and has no added sugars. These formulas offer your small pet the very best of health—naturally!

Food for Life

We all want our rabbits to live long and happy lives. When you choose Science Selective, you get tailored nutrition for all life stages and lifestyles, to help support your rabbit’s vitality and digestive health.

Selective Adult Rabbit

Adult rabbits have specific nutritional needs. Selective Adult Rabbit is formulated with 25% crude fiber and a balanced calcium-to-phosphorous ratio, so you can be sure you’re providing the finest for your bunny. Help support your furry friend’s overall well-being with vet-recommended Science Selective rabbit food.

Selective Naturals Treats

Science Selective offers a wide range of veterinarian-recommended, species-specific foods formulated to meet the nutritional needs of a variety of small pets. They also make treating your pet as healthy as it is delicious with Selective Naturals treats. These tasty baked treats made fresh in their Suffolk, UK bakery are high in fiber and contain no added sugar—an ideal recipe for herbivorous small pets.

Selective Guinea Pig

Selective Guinea Pig food with natural ingredients like dandelion and fennel provides a tasty balanced diet for your pet. High in fiber to promote healthy teeth and tummy, it also has added vitamin C, and omega-3-rich linseed promotes a thick, shiny, richly colored coat and healthy skin.

Selective Grain Free Guinea Pig

Selective Naturals Grain Free has tasty timothy hay to promote your guinea pig’s good health and it is kind to teeth and in line with your pet’s natural diet. High in fiber and grain-free with no added sugars or artificial colors, this tasty recipe includes essential forage and garden vegetables.

Our Ingredients

Science Selective uses the highest quality natural ingredients—with no palm oil, ever—and a traceable manufacturing process from field to bowl.

Healthy Fiber

High levels of fiber help promote good dental and digestive health in your small pet.

Healthy Digestion

Formulated with natural prebiotics (MOS) to support healthy gut motility and digestive well-being.

Healthy Weight

A low calorie content and no added sugars help prevent obesity in small pets.

Healthy Omegas

Added linseed, a natural source of omega-3 & -6, promotes healthy skin and glossy coat.

About Science Selective

Science Selective foods are vet-recommended, species-specific foods made to meet the nutritional needs of small pets. Rich in natural ingredients, they are naturally delicious with no added sugars. Their foods for small herbivores like rabbits, guinea pigs, chinchillas and degus are carefully blended with a balance of long and short fibers plus natural prebiotics for optimal digestive health. Each recipe is made with fortified and stabilized vitamins and minerals that are easier to digest.

Shop Science Selective

Compare Similar Items

Customer Rating
Rated 4.7959 out of 5 stars
Rated 4.8148 out of 5 stars
Rated 4.3149 out of 5 stars
Rated 4.6316 out of 5 stars
Rated 4.4286 out of 5 stars
$18.50Chewy Price
$12.49Chewy Price
$11.19Chewy Price
$11.99Chewy Price
$14.99Chewy Price
$17.57Chewy Price
$11.87Chewy Price
$10.63Chewy Price
$11.39Chewy Price
$14.24Chewy Price
Top IngredientsWheat, Soybean Meal, Barley...Whole Brown Rice, Oat Groats, Wheat Bran...Dehulled Soybean Meal, Ground Corn, Wheat Middlings...Ground Corn, Soybean Meal, Wheat Middlings...Corn, Ground Corn, Wheat...
Food FormPelletsPelletsPelletsPelletsMix, Nuts, Grains
Health FeatureDental & Breath Care, Digestive Health, Skin & Coat Health...Vitamins & MineralsDental & Breath CareVitamins & MineralsDental & Breath Care, Digestive Health
Special DietHigh-ProteinLow FatHigh-Protein
Small Pet TypeRatRatMouse, RatMouse, RatMouse, Rat

Questions & Answers

3 Customer Questions

Is the packaging made of paper or is it plastic?
Answer by ChewyMar 04, 2023
The packaging is made from single polymer plastic that can be recycled at dedicated facilities.

What is the size of this kibble?
Answer by ChewyJan 26, 2021
The kibbles are small triangle shaped nuggets suitable for rats and mice.

What is the crude protein content in this food? There is no picture for the percentages for anything on here.
Answer by ChewyMay 03, 2020
This food contains 14% Crude Protein, minimum. For a complete list of ingredients and the guaranteed analysis, click the “Nutritional Info” tab on the product page.  

ReviewsWrite a Review

Rated 4.7959 out of 5 stars
49 Ratings
Would recommend to a friend

48 Customer Reviews

Rated 5 out of 5 stars
By Gabrielle on Nov 15, 2023

My Rats Are Obsessed!

It’s been difficult trying to find a balanced block for my adult rats. They wouldn’t even touch a fair amount of different brand blocks and are heavy chewers. Even putting tiny amounts of malt paste on some pieces didn’t work at all and they go insane for malt paste. I put this in their food bowls one day and never stopped! Great block base for your adult rats diet!

Rated 2 out of 5 stars
By CharBar on Oct 10, 2023

Rattos won’t eat it

I had high hopes for this food, seeing that it seems nutritionally well-balanced for adult rats and I like that it’s made in the UK. My rats, however, have declared mutiny and have repeatedly moved all of it into their bathroom corner :( I tried introducing it slowly and they ate around it. It’s now been a solid month and they’re still not fond of it so I’m going to need to discontinue it. To me it smells kind of like a rice cake so I get it! Before this they’ve eaten Harlan-Teklaad and Oxbow regal rat with no issues, so this one is a no for me.

Rated 5 out of 5 stars
By Patricia on Sep 15, 2023

Good product

I did a bit of research before purchasing this. I like that the protein seems to be in line with what rats usually need.

Rated 5 out of 5 stars
By PotatoPar1083 on May 18, 2023

Lab rat quality

It’s probably the best vegetarian or even best overall rat diet and the bag is huge, it will probably last me 3 months I have two big Joie bags full of them and some left over in the bag still lol.

Rated 4 out of 5 stars
By Sarah on Jul 26, 2022

Only kibble my rats will eat

As the title says, this is the only kibble I feed my rats as they are picky brats and would rather starve than nibble at an oxbow or mazuri block. They are very happy with this and they are hard enough that they love to crunch on them, but my rat with tooth problems can still chew them with his molars. I do wish for the quantity that the price wasn't so high, as with four rats a single bag lasts about a month even when mixed with some extra grains, nuts, and vegetables.

Rated 5 out of 5 stars
By Kimm on Sep 12, 2022

Really great product

My rodents seem to love this food and they are very healthy. I think it's apple flavor possibly but it's one of the only ones they eat

Rated 5 out of 5 stars
By Rats on Aug 5, 2022

The ladies love it!

I got this to transition my 2 ladies from young rat food since they’re about 6 months old and they eat this like it’s a special snack!

Rated 5 out of 5 stars
By tonybeanzbuttons on Jul 6, 2022

My rats are OBSESSED

This is their FAVORITE pellet. They'll even choose it over fruit and veg at times, they absolutely love it!!!

Rated 5 out of 5 stars
By Compupam on Feb 18, 2022


My daughtets rats absolutely love this food. She has to make sure she doesn't overfeed them with this food because they can easily overeat it, that's how much they like it. Definitely worth every cent. I highly recommend buying it, especially if your rats are picky about their food like hers are.

Rated 5 out of 5 stars
By Chey on Mar 9, 2022

My rats love it!

Science Selective is one of two lab blocks available in the USA that meet modern nutrition requirements for pet rats. The other is Oxbow Essentials. Please do your rodent friends a favor and offer one of these foods to them!