Hi, Sorry to hear about your dog. I've had my 3rd yorkie for a month now, my first boy. He was a terror to potty train at first, partially because he came to me at 5 months old because he was so tiny (at 6 months he is maybe 3 pounds), but he has now been almost flawless for 2 weeks (this could change at any time as they do go through phases and he could start testing me). My other 2 yorkie girls are trained to go on pads exclusively as well (and also on command - whenever they go you just give the command, or take them to the pad when you think it's time and give command). However, one I got when she was a little older (closer to 4 months old) and had already gotten used to going outside when she was at the breeder's, so she was extremely difficult to train, and at the age of 4, she started to refuse to go on pads for #2 and hold it until it just all...well...explodes wherever she happens to be.
This is unusual and she is an exceptional case I would say, but anything can happen. I haven't been able to fix this yet but I make her go on command twice a day to avoid accidents. The key to training IMO is to watch every single move until the puppy is reasonably consistent (they have tiny bladders) and praise with teeny bits of treats every time (you don't want diarrhea or them not eating normal food). This could take weeks or months. Also, with my girls I crate-trained them, but with my new boy, I had him in a pen that just fit a bed, food/water and pad inside a pad-holder (puppy may otherwise shred pad). This helped him get used to the pad, but beware that if puppy is bored and so inclined, it may lead to poop-eating if there is poop just lying around! Luckily I don't think this puppy likes poop but my girls have gone through terrible phases. Ok, whew. That was a lot, but I haven't contributed much and reaped a lot from this forum so I thought it was time. It is completely possible to train little dogs - don't underestimate their intelligence - I've never had smarter dogs. Good luck!
