Pet rats are intelligent, social, and affectionate animals that make excellent companions when provided with proper housing, nutrition, enrichment, and veterinary care. They are easy to train, enjoy interacting with their owners, and thrive in stimulating environments.
Rat Facts
- Rats are clean, docile, cuddly, and easily trained when handled gently.
- They are highly intelligent and capable of learning tricks.
- Average lifespan is 2–3 years.
- Rats can live successfully either alone or in compatible social groups.
- Males reach sexual maturity between 65–110 days of age.
- Females reach sexual maturity between 65–110 days of age.
- Gestation lasts approximately 21–23 days.
- Early spaying and neutering during the first few months of life is recommended to reduce aggression and certain health problems.
- Adult males typically weigh 260–500 grams.
- Adult females typically weigh 225–325 grams.
- Rats cannot vomit and do not have a gallbladder.
Housing
The larger the enclosure, the better.
A proper enclosure should provide enough room for:
- Food and water stations
- Hide boxes
- Nesting areas
- Toys
- Climbing opportunities
- Exercise
Choose a cage with:
- A solid bottom
- Wire sides for proper ventilation
- Multiple levels
Cover the cage floor with several inches of Carefresh® paper bedding.
Provide enrichment items such as:
- Fleece pouches
- Hide houses
- Chew toys
- Tubes
- Solid exercise wheels (without open rungs)
- Ropes
- Shelves
Maintain enclosure conditions at:
- Temperature: 70–80°F
- Humidity: 45–55%
Rat urine contains high levels of ammonia, which can irritate the respiratory system.
Clean the enclosure thoroughly and replace bedding 1–2 times each week.
Avoid using:
- Cedar shavings
- Pine shavings
These aromatic woods contain natural resins that may irritate the skin.
Never place the enclosure in:
- Direct sunlight
- Drafty areas
Diet
Feed a high-quality pelleted rat diet specifically formulated for rats.
Recommended protein content:
20–27% protein
Adult rats typically consume:
15–20 grams (less than 1 ounce) of food daily
Seed diets are not recommended because they are:
- High in fat
- Associated with obesity
- Linked to an increased risk of mammary tumors
Fresh, clean water should always be available using a water bottle fitted with a sipper tube.
Average daily water intake:
22–33 mL (1–2 ounces)
Fresh fruits and vegetables may be offered as occasional treats.
Limit treats to approximately:
1 tablespoon daily
Avoid gas-producing vegetables, including:
- Broccoli
- Cauliflower
Common Medical Problems
Obesity
Obesity can often be prevented through:
- Proper nutrition
- Regular exercise
Mammary Tumors
The risk of mammary tumors may be reduced by:
- Spaying females before 3 months of age
- Providing 0.2–0.4 mL of flaxseed oil daily
- Limiting dietary fat
- Using a Deslorelin hormonal implant when recommended by a veterinarian
If a tumor develops, surgical removal is generally recommended.
Pneumonia
Pneumonia is commonly caused by bacterial infections.
Signs may include:
- Reduced appetite
- Difficulty breathing
- Eye discharge
- Nasal discharge (sometimes red in color)
- Decreased grooming
Treatment generally includes:
- Antibiotics
- Supportive care
Abscesses
Abscesses may develop following injuries caused by:
- Cage furnishings
- Cage mates
They often appear as:
- Round lumps beneath the skin
- White-centered swellings
Treatment usually requires surgical drainage.
Lice
Lice are the most common external parasite affecting pet rats.
The parasites may be visible crawling through the hair coat.
Rat lice only infest rats and are generally easy to treat.
Kidney Failure
Kidney disease most commonly affects older rats.
Signs may include:
- Reduced appetite
- Changes in urination
- Changes in urine color
Treatment depends on the underlying cause but commonly includes fluid therapy.
Preventive Veterinary Care
Routine wellness examinations are recommended every:
6–12 months
Regular veterinary care, proper nutrition, clean housing, and environmental enrichment help maintain good health and improve quality of life.
