I recently moved and we now have an air conditioner. I breed my own feeders but it seems that my girls are just not getting pregnant. I gave one mom about a month of recoup time and I put a male in about a month ago... She didn't start to look pregnant at all but I did see them mating quite a few times. SO I swapped the male out thinking maybe he just wasn't producing and added another plus another female in case it was the original mom. I've gotten two good litters out of her and I can't understand why they wouldn't be breeding for me. I've heard of rats not producing if it's too hot, but too cold? It never gets below 60* in the room. Could the temps be causing it?