How much should you feed rats? - briefly
Adult rats require about 1–2 tablespoons (15–30 g) of a nutritionally complete pellet diet daily, with constant access to fresh water and occasional small portions of fresh fruits or vegetables. Increase the quantity for growing or highly active individuals and reduce it for overweight or less active animals.
How much should you feed rats? - in detail
Rats require a diet that supplies roughly 50 kcal per 100 g of body weight each day. Energy needs rise during growth, pregnancy, lactation, and periods of high activity; they decline in older or less active individuals.
For common pet rats, daily intake can be estimated as follows:
- Neonates (under 3 weeks): 2–4 g of high‑protein formula per 100 g of body weight.
- Juveniles (3 weeks – 3 months): 10–15 g of commercial rat pellets per 100 g of body weight.
- Adults (3 months – 12 months): 15–20 g of pellets per 100 g of body weight.
- Seniors (over 12 months): 12–15 g of pellets per 100 g of body weight, adjusted for reduced activity.
A typical adult rat weighing 300 g therefore needs approximately 45–60 g of dry pellets each day. Fresh vegetables and fruits should supplement 10–15 % of the total diet, providing vitamins and fiber without exceeding 5 % of caloric intake. Protein‑rich treats (hard‑boiled egg, cooked chicken) may be offered in small portions, not exceeding 2 % of daily calories.
Feeding schedule:
- Provide a constant supply of fresh water.
- Offer the measured amount of pellets once daily, preferably in the morning.
- Distribute fresh produce in a separate dish, removing uneaten items after 2 hours.
- Limit high‑sugar or high‑fat treats to occasional rewards, not more than twice per week.
Monitoring guidelines:
- Observe body condition score weekly; a healthy rat maintains a smooth, rounded abdomen and visible but not protruding ribs.
- Adjust portions upward if weight loss exceeds 5 % of target body mass over two weeks; reduce intake if weight gain exceeds 10 % in the same period.
- Record any changes in appetite, fecal consistency, or activity level, as these may indicate nutritional imbalance or health issues.
Adhering to these quantitative recommendations ensures that rats receive sufficient energy, nutrients, and hydration for optimal growth, reproduction, and longevity.