We have a 3 year old female who was mated with our 12 year old male. This is our females 2nd litter first to a different male. Our female didn't get a big belly with either pregnancy she is naturally a slim dame. She had 7 pups the first time. We Are wondering about the males age having a factor in littler size. Last time we could palpate the pups and we can't so well this time. She is due in 5 days. Any thoughts?