Re: New kitten
First of all, definitely do not give him any milk. Cow's milk is not easily digestible for cats and will give the little guy upset tummy. As far as not drinking, it could probably be lots of things. Cats have very little thirst drive, so it could be normal. Are you feeding him soft food or dry food? It's possible that he's a little young for the dry food, and therefore simply prefers it soggy. I would recommend giving him some quality wet food, in addition to the dry. If he really isn't drinking at all, continue to water his food down a bit so that he stays hydrated, and take him to a vet ASAP (regardless of health concerns, new kittens should always be taken to a vet). As far as the litter-eating habit, I'd try switching to a non-sand type of litter, preferably something non-toxic until he matures a bit.