Does allowing a male to breed change personality?
 

I have an 8 month old yorkie male. He weighs about 3 1/2 lbs. We attended an event last weekend for the local humane society and I was bombarded with stud service requests. He is a beautiful little guy and small, and I guess most people around here go for girls because I got at least 5 requests there and I have also been asked by 2 people at my church. His only fault is that he was born without a tail, not that I think that would really matter to most people since I don't think they are really looking at breeding dogs for show. We haven't had him neutered yet because of his size. The vet said we should wait until about now to do it. We are really wondering what to do. I've heard some opinions that breeding a male can change their personality and make them more aggressive. Is that true? Any opinions? We would love to have a female puppy at some point, but just as a pet. We aren't really interested in beginning breeding or anything. We thought that allowing him to stud at least once might be a way for us to get a female, but it's not worth it if it changes our little man in any way. I would really be interested in any input that anyone has. We want to do what's best for him and we are planning on having him neutered soon, so we have to make a decision. Thanks.

I don't have males but I understand that once they are used for stud you can have problems like marking or humping that will continue even after they are neutered. There was even a thread on here about how a neutered ex stud tied with someone's female in heat. I'm not sure what the staticstics are. Personally, I would not chance it as you also have a big responsibility when you stud dogs and for a one time thing, I personally wouldn't risk it.

I'd have him fixed as soon as possible, you know what puberty does to human boys; they go from these sweet innocent little things to MEN! Same with dogs, if you want to keep your little boy, a little boy, neuter him. He won't miss something he's never experienced. Once a dog has been used to stud, it's almost impossible to stop the marking even after neutering. Also don't forget he can catch an STD from a girl even if it's her first time. You will also have to put up with him being nervous and anxious every time he smells a female in heat, and they can smell the odor for up to 10 miles. The number one cause of death in unneutered male dogs is due to injures caused by being hit be a car, unneutered males are also likely to run away.

Having raised yorkies for over 12 years and having owned a number of males I can tell you honestly that using a male for breeding can change their personality in certain ways. Each male is different so you don't know how they will react but most males when around a female in heat will whine, bark, quit eating and just act plain miserable but that is when the in heat female is kept in the same household. So to honestly answer your question, using him as a stud would not make him mean or aggressive, he would be the same sweet boy he is now but if you kept him in a situation where he was around a female in heat for 3 weeks and around other males at the same time, yes he could get aggressive toward other males. Also, males tend to mark more when around a female in heat.

Also you mentioned your male had a birth defect, no tail. While that is not a life threatening birth defect it would concern me that what other type of inheritable birth defects genes he might be carrying. There are many risks in breeding so since you stated you are not interested in becoming a breeder, I feel it would be best to not breed your male just to get a puppy but instead just go buy him a perfect little companion.