[horsnaround]

I think you ask very good questions. She sounds like she could be pregnant. Usually the pups will come between 63 and 65 days. I always feed my mommy puppy food during pregnancy and as much as she wanted. I then would have some food I got from my vet to give her a little between pups. She has had three litters of seven and never a problem.I too bred to a smaller male ( not that young tho). My vets told me second heat of a dog was okay to breed. ( I know many disagree ) but I went with my vet. Lexi is know spade and all the pups have found wonderful homes. She did weigh more then your female. There is a lot of sad things that can happen. But also many times things go fine. Yes you have to be prepared for either. It was a very good experience for me.
But have read many terrible stories about whelping. I to researched a ton and had a experienced yorkie person on Skype watching the first time she delivered. Which helped a ton. The next two litters went very well also I take everyone to the vet within the first three days for tails and dewclaws and to check them over along with mom. Good luck.