My scottie puppy (15 weeks and 8 lbs.)has had all of her shots. Her last shot(including rabies) was at 14 weeks. She has become withdrawn and less playful (her sister is 10 lbs. and active. I just discovered a lump on her side about one inch forward of her hip. Her main change has been in her behavior. Appetite is good, but less active. She looks/acts depressed. She was just groomed for the first time on 10/29/05. The lump is not sensitive, howevershe does stop and scratch in the general area. Coat and skin look normal. Any ideas?