Pure chocolate isn't something to feed your rats or mice. It does have caffeine in small amounts and loads of sugar. Not horribly terrible, just not something you'd want to practice.


Rats and mice love cereal like cheerios and bran like things. Just be sure its not loaded with sugar and you can feed it along with their regular lab blocks.

My rats pretty much get what ever scraps we have left over, avoiding things on the "do not feed list." I have also never understood why to not give rats city treated water. I do it.


http://www.petratscanada.com/forbidden_foods.htm
http://www.ratfanclub.org/diet.html