We also have vegan rats! Do you feed yours soymilk (in addition to water)? ours love it and will cup some in their hands and drink it. i've read that it's very good for them, especially since they are so prone to cancers. rats are so cute! we also have cats (not vegans) and a dog who is veganish. she has vegan dog food that we suppliment with fresh veggies and grains, but whenever she can she eats the cats' food.
"Live simply so others may simply live" ~ Gandhi