How old should a male dog be to breed?

Dogs, male and female, are sexually mature at 6 months of age.

About a year old is when most breeders will start to breed.

1 1/2 to 2 years

Unless he has something to offer to the continuation of positive breed characteristics which are necessary for the maintenance of breed standards, no dog should be used in a breeding program. If your dog is a mutt, or substandard, get him neutered.

[Yogi]

the age of sexual activity is not the age that breeders use to indicate whether a male of female will be used to breed. The breeding will not commence by a reputable breeder until a female has gone through 3 seasons or at approx 18 months to 2 years. The same with a male. At this time as a former long time breeder I was able to tell if the dog was to standard and its health was ok to consider it for breeding. So to answer the question as to what age the male should be for breeding, 18 months to 2 years. Note, puppies should never have puppies.

a male dog should be atleast 9 months old to a year old..