That's interesting; and I'm perfectly willing to concede that I was wrong - once you can refer me to literature which supports your claims of course. In any case: a dog's milk is hardly introduced as a staple (i.e. permanent, and allegedly 'necessary') feature of the cat's diet, is it? If it is, I'd guess it's a rare phenomenon; perhaps isolated to 'orphan' cases? (...again, pefectly willing to concede that I'm wrong) And in what environment does this phenomenon occur? Is it human-induced behaviour? I'll also add that: I was only mentioning that as a pre-emptive argument to anyone who might bring in the but drinking milk is 'natural' argument. I wouldn't feel compelled to drink milk even if it was/is a natural thing to do. I can obtain the necessary levels of calcium from other sources.