I'd also be hesitant to give yogurt to chins since they're vegetarians -- the lactose may upset their stomach even more! You can buy acidophilus capsules at most drug stores that will do the same thing.
We are as gods to the beasts of the fields. We order the time o' their birth and the time o' their death. Between times, we ha' a duty. - Terry Pratchett.
"Men have forgotten this truth", said the fox, "But you must not forget it. You become responsible, forever, for what you have tamed. - Antoine de Saint-Exupéry