My American Bulldog pup is 7mths old now and he gets fed biscuits and chicken necks for breakfast and dinner. I have noticed that when he's standing up, I can see his ribcage but he doesn't look thin we feed him enough its just that his ribcage can be seen lightly sticking out thru his fur when he stands up. Is this common at all with AB pups? maybe once he widens up his flesh will cover his ribcage? Any suggestions or comments? thanks.