Next week, my sister's will be coming to stay with me for 10 days. They told me that they are bringing with them, their female black lab pup named Lupin who is 8 months old and 1 week into her first heat ....My intact (for now....) male dobie Jaxon is 7 months old. I was wondering if he is even mature enough to sire a litter at his young age? Do you think I should find someone to watch him during the time they are here? He is still all puppy, I'm not sure how worried I should be about this situation...... also, I don't know if I could send him away for 10 days!!!!! We have been attached at the hip since i brought him home.