Angelzoo, thats what I did, gave my critter canteen to my ferrets, as some of my rats could not get any water out of it. I have 2 kaytee water bottles & one by some other company for my rats.
I give my rats dentabones, rawhides, meat bones left over from supper, treats they get EVERYTHING (except junk food) I eat. Their main diet is a rat seed mix (seeds fruits etc) mixed w/ lab blocks. I also give them some dog food & cat food. Sometimes alfalfa or sweet grass too.