We have a 3 1/2 year old male St. Bernard and our three Bully girls. No one has been "fixed", so needless to say, "something" has to go, sooner rather than later. A week or two ago there was an article on here about the pros and cons of spaying and neutering at a younger vs older age. It pretty much was hands-down in favor of doing this at a little older age. So I think it makes more sense for our family, to neuter Arrow now, and wait a while on the girls. But my husband is concerned it will change Arrow's personality. He has never been bred, he is soooooo lazy and laid-back, I can't imagine we would have any big changes in him. But I told my husband I would ask everyone on here for their opinion.