It sounds like he could have an allergy or possibly an ear infection. Check his ears carefully for signs of an infection, and also see if there is an odor. But since it is both his feet and ears, I would think that it is more likely an allergy. Try wiping his feet and ears down with a warm cloth of soapy water to see if that gives him any relief.
How old is he? He seems a bit young to be away from his Mom. It could be nerves. Is he from a professional breeder or a pet store? I would definately take him to the vet for a check up to be sure he doesn't have any parasites or allergies. If he is from a breeder, try to contact them about the behavior and see if the other pups are having any problems.
he is 1.5 month old, he is from professional breeder. I've called her, and she promised me to find out what it could be. Anyway, we'll go to the doctor.
Thank u for your help. I'll write about the results.