Nothing you've said about him would put him outside of the breed standard (except for his weight, but there are porky yorkies).
As for the agression, he might still be clearing some of the hormones out of his system. At 7 months, a lot is happening to him in his development, and he might just be in a stage.
There are ways to help him to trust strangers. Take him to a place like Petsmart where they're understanding of bad behavior, and ask some strangers to help you train him. Bring some ridiculously tasty treats with you--make these your special "stranger treats." Ask strangers if you can give them one to then give to Einstein. Never give him those treats in other circumstances. Einstein should start to associate strangers with good things (i.e., the treats) and look forward to seeing them.
As for the poop eating, you can put tabasco sauce on it right after he goes. That'll teach him real quickly not to eat it. |