I would say that, like humans, it may or may not happen. My MIL has a kennel and does tend to have a LOT of them go into heat together and ends up with quite a few litters at a time. However, not all of them do so she will still have some other litters every here and there. My Mom has 3 females and 2 of them went into heat at the same time. Both had pups. That was almost 2 years ago. One has had pups since then and the other has never gone into heat again. I know this is long, but I'm just saying that it will still be unpredictable. I have 2 that came in heat a week apart....I'll have to see if it happens again next time. My Mom's Yorkie that had a c-section last time is the one that hasn't come in heat again. |