It's not something I would choose to do, but, in your case, doesn't look like you have much of a choice. My first yorkie, JPop, was only 6 weeks (I didn't know any better). Just make sure he eats well, doesn't go hypo on you and just give lots of TLC. Have your vets number handy at all times. Please don't not get him because of this; it can be done. Lots of luck!