Thanks for the answer! I have another problem i forgot to add to the post though, so i hope you don't mind me asking an additional thing, or i might just post another thread. I just checked the site i order the food from, but the rats are too small or too big compared to what i am searching for. Looking at the feeding chart rat pups weigh about 20-29 grams, but the site just offers rats that are 13-20 grams or the ones that are 30-50 grams, but they do have adult mice that which are also fed to BP's my weight. Have you got any idea what should i order? The rats that weigh more or less? I want change his diet before he becomes a picky adult, but i can go for the adult mice too if that's the best option.