I feed 6 weeks old rats which are about 120 grams to my biggest girls over 2000 grams, even to those who are close to 4000 grams.

Anything below 2000 grams I feed rats in the 80/100 gram range.

Males I feed less, 50/60 grams rats

Small rats are usually around 60/80 grams

Medium rats are 80/175 grams

Your feeding is fine, keep in mind that in captivity we are overfeeding anyway.

Now if the animal is a female you wish to breed you can increase feeding right before breeding season feeding every 5 days instead of 7.