I would have him quit sucking on the pillow . It can build to an obsession . Flank suckers - okay , Dobes are supposed to be notorious for this. To relieve a little stress the dog , when resting, turn his head to the skin part after the ribs and before the back leg , and just hold on and drool . Some go a little further and will nibble the hair , not break skin , just do the grooming nibble , and the dog looks like a sculptured carpet. Other obsessive behaviour is licking , turning in circles .