not for too long
Only if the outside unit is a heat pump.
You should not breed your female until she has had her 2nd or 3rd heat.
It means she's really interested in making some puppies. If you have a girl dog in heat, you should think about having her spayed.
They usually go back into heat 4-6 months after delivering. 6 months after she came in heat last, it never changes even if she has puppies, she should come in heat when her puppies are around 4 months old.
Only if she mated successfully whilst in heat.
The indoor temperature setting should be at a comfortable level for living in. The outside temperature should be an irrelevance.
She should be spayed at least one month after she comes out of heat, and at least one month before she is expected to come back into heat. That typically leaves a three month window of opportunity.
You could have puppies with birth defects when the parents mate with the puppies. If you plan on keeping them all together, you should neuter the puppies. The mum and dad will be interested in each other the next time the mum goes into heat.
I have had two female pugs and , it has gone into heat at 6-12 months, our vet recommended not before 1 should a dog have puppies, this is because the puppies would be to big for the mom....
You can breed when she has her 2nd heat.
By her 2nd heat.
Nothing. The female must be on heat to breed puppies.