
Pet rats are omnivores, meaning they eat a variety of foods, including vegetation, seeds, grains, and meat. They are also highly intelligent, inquisitive, and social creatures, which means they need both physical and mental stimulation. This can be provided through toys and puzzles, as well as a nutritionally balanced diet. A pet rat's diet should primarily consist of a high-quality, nutritionally balanced food formulated specifically for rats. In addition to this, small amounts of fruit, vegetables, grains, seeds, and lean meat or eggs can be given as treats, as part of their daily food allowance.
What should a pet rat's diet consist of?
| Characteristics | Values |
|---|---|
| Diet Type | Omnivorous |
| Main Food | Commercial food pellets/blocks/nuggets formulated for rats |
| Other Foods | Small amounts of fruits, vegetables, lean meat, grains, seeds, nuts, cooked eggs |
| Foraging | Natural behaviour that should be encouraged |
| Water | Essential, provided in bottles, multiple sources, cleaned and refilled regularly |
| Food Bowl | Ceramic |
| Food Frequency | Continuous supply |
| Food Placement | Scattered around the enclosure, hidden in cardboard boxes/tubes, loose hay |
| Harmful Foods | Onion, citrus fruits, grapes, raisins, rhubarb, lettuce, walnuts, chocolate, caffeine, raw beans, sweet potatoes |
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What You'll Learn

The importance of water
Water is an essential part of a rat's diet and is often overlooked. It is vital that your pet rat always has access to fresh, clean drinking water. Water bottles with a metal spout are a good option and are available at most local pet stores. They need to be cleaned regularly with a rat-safe disinfectant to prevent harmful bacteria from building up.
Rats need a continuous supply of fresh, clean drinking water, and bottles are preferable to bowls to avoid contamination. Provide several bottles so that all your rats can drink simultaneously without competing for water. Check their water bottles in the morning and evening, and refill them twice a day to ensure they never go thirsty.
Water is crucial for the health of your rat. It helps to regulate body temperature, especially during hot weather or when your rat is exercising. Water also aids in digestion, ensuring that your rat's body can properly absorb nutrients from food. Additionally, water helps to flush out toxins and waste products from your rat's body, keeping it healthy and happy.
In addition to water, a rat's diet should consist of a variety of fresh foods. The majority of their diet should be formulated rat food, such as nuggets or pellets, to ensure they get the right balance of nutrients. As rats are omnivores, their diet should also include small amounts of fruit and vegetables, lean meat, and cooked eggs. It is important to avoid harmful foods such as onion, citrus fruits, grapes, raisins, chocolate, and high-fat dairy products, as these can lead to health issues.
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Nutritional requirements
Pet rats require a nutritionally balanced diet. The foundation of their diet should be a well-balanced, uniform, fortified pellet or rodent block free of artificial flavours, colours, and preservatives. This ensures their nutrient and caloric needs are met, and prevents selective eating of high-fat and high-calorie items, which rats will naturally gravitate towards.
As omnivores, protein and fat are critical components of a rat's diet. Rats also require fibre, which can be sourced from oats, barley, flaxseed, some fruits and vegetables, wheat bran, cereal hulls, and grass hays. A small amount of fruit and vegetables should be supplied daily in a pet rat's diet to provide variety and additional nutrients. It is important to only feed fruit and vegetables that are safe for rats, as some items such as citrus fruits, grapes, raisins, rhubarb, lettuce, and walnuts can be toxic. Lean meat, such as chicken, and cooked eggs can also be provided as an occasional treat and source of protein.
It is important to monitor a rat's caloric intake and couple it with stimulating activity to ensure their overall health and well-being. Rats are prone to obesity, which can lead to the development of large fat deposits under the skin that can inhibit movement. To keep a rat's weight under control, they can be given puzzles to solve for their food, put in multi-level cages, or allowed to run around in a safe environment.
Rats also need to eat fresh faeces to absorb all the nutrients and minerals they need to stay healthy. Not eating faeces can cause nutritional deficiencies and health problems. Rats also need access to fresh, clean drinking water at all times, which can be provided in bottles rather than bowls to avoid contamination.
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Commercial food pellets
The basis of a rat's diet should be commercially available pellets or lab blocks made specifically for rats. Rats are omnivores, so while they should be offered pellets or lab blocks daily to ensure they are getting all the nutrients they need, their diet can also be supplemented with small amounts of fruit, vegetables, cooked egg, grains, and seeds. It is important to ensure that these supplements are given as part of their daily food allowance, rather than in addition to it, to avoid obesity or health problems.
There are several commercial food pellet options available for pet rat owners. One popular option is Oxbow Essentials Adult Rat Food, a nutritious and fortifying kibble that cuts out unhealthy ingredients while satisfying a rat's omnivorous palate. Oxbow also offers a complementary pellet diet designed for rats under 6 months old, which is higher in protein to support muscle and bone development. Another option is Kaytee Forti-Diet Pro Health rat food, which comes in 3 and 25-pound bags. This option contains some lower-quality ingredients like sugary molasses, and the pellets can get a little crumbly.
It is important to note that not all commercial food pellets are created equal. Some are designed for laboratory rats, such as Envigo Teklad lab blocks, and may not be the best option for pet rats. Additionally, some pellets are made for other herbivores, such as rabbits, guinea pigs, or hamsters, and will not provide the necessary nutrients for rats. It is always important to read the ingredients list and guaranteed analysis to ensure the pellets contain the proper balance of nutrients for your rat's diet.
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Fresh food supplements
Fresh fruits and vegetables are a great source of soluble fibre for pet rats. Soluble fibre helps to improve colon health, stool quality, and may help reduce cholesterol. Examples of soluble fibre sources include oats, barley, flaxseed, and some fruits and vegetables. It is important to avoid citrus fruits, grapes, raisins, rhubarb, lettuce, and walnuts, as these can be toxic to rats.
Lean meats, such as chicken, can also be given as an occasional treat and source of protein. Cooked eggs are another good source of protein and can be offered as a treat, either boiled or scrambled. It is important to only give small amounts of meat and eggs as treats to avoid obesity.
Rats also need mental and physical enrichment, so it is recommended to provide them with toys and other items to chew on, such as cardboard, coconut shells, or soft wood. Foraging behaviour can be encouraged by scattering food throughout their enclosure and hiding it in cardboard boxes or tubes. This provides enrichment, exercise, and reduces competition over food in groups of rats.
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Treats and rewards
When it comes to treats, it's important to remember that rats are omnivores, so their diet should include a combination of fruits, vegetables, and meats. Fresh fruits and vegetables can be given as treats, providing variety and additional nutrients to their diet. Some safe options for rats include apples, bananas, berries, broccoli, carrots, and spinach. It is important to avoid certain foods that can be harmful or toxic to rats, such as citrus fruits, grapes, raisins, rhubarb, walnuts, chocolate, caffeine, and raw beans.
Lean meat, such as cooked chicken, can be given as an occasional treat in small amounts. Cooked eggs are also a good source of protein and can be offered as a treat. Rats enjoy manipulating their food with their paws, so giving them a cooled, unpeeled boiled egg to break into can be a fun and stimulating treat.
In addition to food treats, rats also enjoy chewing on cardboard, coconut shells, or soft wood. Chewing is important for the health of their teeth, as it helps to wear them down and prevent issues associated with overgrown teeth. However, it is important to bake and wash any wood given to your rat to ensure it is safe and free of harmful chemicals.
While treats are an essential part of a pet rat's diet and can be used for training and bonding, it is crucial to monitor their intake to prevent obesity. Rats are prone to obesity, which can lead to health issues. Therefore, treats should be given in moderation and as part of their daily food allowance rather than in addition to it.
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Frequently asked questions
Your pet rat's diet should consist of a high-quality, nutritionally balanced food formulated specifically for rats. This is usually in the form of pellets or blocks.
Rats are omnivores, so you can supplement their diet with small amounts of fruit, vegetables, grains, seeds, lean meat, and cooked eggs.
Avoid feeding your rat onion, citrus fruits, grapes, raisins, rhubarb, lettuce, walnuts, chocolate, and other foods high in sugar or fat.
Rats are very social, so it's recommended to keep at least two together. You can also provide them with toys, such as natural chews or cardboard boxes, and loose hay.




































