No they can be introduced while in heat.
Answerit depends on the size and breed of dog, but usually large breeds take about six months to come into another heat cycle.
Any time after the first heat (menstrual) cycle is safe to breed your dog.
I've always heard that the best time to breed your dog is the 3rd heat.
No. My dog was well into having heat (dog period) and then had puppies before we got her fixed and she's been fine and sterile ever since. Another Answer: You can have your dog spayed while in heat or even after heat if she has been bred. Some vets charge more if they are in heat or pregnant. But it's perfectly safe for your dog.
NO IT ISNT
A dog, at seven months od, may go into "heat," but she isn't mature enough to be bred until the second heat.
No Houndog would be but dog isnt.
maybe it's still not in the state of heat. wait for it to menstruate then count 11 days then it ready.
In June Anytime, if she is not bred the first time, about every 6-8 weeks.
He was bred as a dog for races and for hunting.
The Papillon (or butterfly-eared dog) was bred to look pretty for aristocratic ladies who wanted a lap dog.