
Call your breeder back and see what they say, they would be the best to advise you on this.
Have you done all the genetic/herditary health checks needed for this breed so in hopes not to be passed onto the offspring?
Is your dog registered?
Is he a good example of the breed?
Did you buy him for pet or breeding? If for pet then that is all he is, he is not breeding potential and you should love him for the pet he is.
Are you aware once you breed him he may not be the same lovable dog he is now? he may change or may stay the same thats the chance you take.
He's 3 years old I personally think you should of thought about this when you purchased him. Since you want another puppy why not go back to your breeder and get one off of her you will save alot more money in the long run. After doing all the tests and everything else involved just to get into breeding it makes much more sense just to purchase a puppy from a good breeder. the reason why I say this is because after reading your post you only want to breed to have a pup not to continue breeding. :( Love him for the dog he is no reason to breed him you may not like his attitude once you do and well you can't turn back the clock :(