This is true, something is only disgusting if you act upon that urge. But Zoophilia is just weird.
to be honest I find child enthusiasm more unusual than zoophilia
human children are a lot more annoying and needy than a cat, or a dog (though that's stretching it a bit), all are about equally affectionate, and children will grow up a lot faster than the average lifespan of aforementioned animals
though there is the whole "non-human animals are incapable of love" thing to think about so whatever