My yorkie is almost 9 months old and has been with me for 7. I've trained him to pee on the pads, but he still doesn't consistently poo on them. He does it once in awhile and other times just does it around it or close by. Plus he takes bites out of it. I've tried pills and treats and punishment and nothing seems to work. Now, he sometimes drag a piece under the couch and eats it there.

Any suggestions???