Loose stool can be very dangerous to young puppies. Can you get pedialite? We don't want him to get dehydrated. Is he drinking? If he is drinking then get him some pedialite if you can. Another thing you can try is goats milk with some honey in it. Cows milk will often cause a loose stool. But goats milk is closer to the type of milk the dam produces.
A seven week old pup should not need milk at all, but if he is under the weather that might help. It is possible that your breeder did not totally wean your boy and he might like milk and be not so sure of the dry kibble. Though, any healthy, self respecting canine should not turn its nose up to eggs and chicken liver.
Don't let this go on for more than 24 hours. At this pup's age, yes he needs to eat several times a day. And it is not healthy for him to totally not eat -- that is an indication that he is not feeling well.
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