Welcome to YT! While yorkies can be hard to housebreak, they are more than worth the many "clean ups" that might occur. Our oldest yorkie, Bruiser, is 12 lbs too and there is just more to love. We have a tiny guy, Marcus, who is almost 6 months and just barley tips the scale at 2 lbs even. There are many things that I just love about Bruiser, but what I appreciate now more than ever is his weight. He is a rough and tumble kind of guy. I don't have to worry about him jumping off the couch or bed and breaking his leges. He is more sturdy and can play rougher than than Marcus. (He also makes for a great pillow when cuddling

lol). Enjoy your Chunk and please post some pics to share. As far as the poo eating, he may grow out of it but if he doesn't try feeding him something to make it taste bad. Good luck!