A dog must be in heat to get pregnant. Heat is basically her ovulation cycle.
She COULD be pregnant. It seems like she may have breast problems in general. If this is the first time it has happened it may be something to do with her heat cycle.
YES!
Yes but it has a better chance halfway through heat
Male dogs will notice a female at any stage in heat, however she will not let him mount her until she is ready to be bred. If she has let a male mount her she is at the stage in her heat where she can become pregnant.
A heatpump that only has one stage of heat and one stage of cool.
A female cat will typically stop being in heat once she successfully mates and becomes pregnant. If she does not mate, she will continue to cycle in and out of heat until she does. If she does not become pregnant, she may experience a rest period before going into heat again.
No, when a mammal is pregnant it will not go into heat while it is pregnant.
Heat cramps, heat exhaustion and heat stroke
No. Only a male can impregnate a female. No female mammal of any species can get another female pregnant. For mammals that have a "heat" cycle, being in "heat" is required for pregnancy by a male. If such a mammal (a dog for instance) is not in heat or doesn't have a male partner, pregnancy is not possible.
No, a cat will not go into heat if she is already pregnant.
Yes, a female no longer goes into heat if they are pregnant.