No, female dogs cannot get pregnant when they are not in heat. Dogs can only become fertile and conceive during their heat cycle, also known as the estrus cycle. Outside of this cycle, the chances of pregnancy are virtually nonexistent. It's worth noting that some dogs may experience a "silent heat" where they go through hormonal changes and can be fertile without showing the typical visible signs such as bleeding. However, even in silent heat, dogs are still only fertile during that specific period, not when completely out of heat. So, pregnancy is only possible during the heat cycle, and not when the dog is not in heat at all.