this is a good link some of the stuff in the diet was off but it still is extremely helpfull
there are online stores where you can buy lab blocks. basically that is what they feed rats and mice in labratories. they are pellets that have all the nutrients and vitemins a rat or mouse needs to be healthy. they arent the best tasting things in the world though.
i personally found that when i looked at the rat/mouse mixes and looked at the labels they had alot more sugar than a rat/mouse should have and they often had far to many sunflower seeds. those are really high in fat and to many can be bad for your ratties heart. they also had dried corn in them with can have fungus in that can make them sick. guinea pig diets arent generally the best for rats because they contain alot of alfalfa made stuff. alfalfa is hard for rats and mice to digest and they dont like the taste of it much. i give my rats a mix simmilar to the one found on the link and supliment it with fresh veg and fruit.
ps: raisins are good as treats but have to much sugar in them to be a part of there regular diet
sory i keep editing this post but i keep remembering things i want to add >.<
my rats mix consists of
8 cups roled oats
8 cups roled red wheat
1 box total serial
5 cups dog food (i use the brand that is lowest in protien get the smallest bag you can find and it will last you ages)
4 cups uncooked unsalted in shell peanuts
3 cups dried split peas.
this isnt a complete diet you still need to feed them other stuff to makes sure they have enough calcium and vitamin k and vitamin c
brussel sprouts, spinnach work best for vitamin k
low fat yogurt and cottage cheese for calcium
strawberries are there favorite with vitamin c in
cooked whole grain rice
things you shouldnt give them
caffiene or chocolate> its ok in really small amounts but to much can cause heart failure