cici's in heat
I have a female boston terrier that is in heat again. I had her breed last summer and she gave birth to 4 puppies. She was breed twice one time per day for two days. I now have my own male and wanted to know if it was a problem to keep them together for the entire time she is in heat. I was told that she could have puppies that were a week younger than the others if I did this and that they could be underdeveloped when she gave birth. Is this true?