It's for males that like to mark, put simply. With enough work and training, though, I don't think they're needed. I have two unfixed boys, 15 months and 21 months, and they NEVER mark in the house. They have before, but as soon as they started doing it, we worked very hard to teach them it was a no no. They do mark outside, but NEVER indoors.
oh, and ps, we are getting them fixed, most likely either this march or april. We are in the process of buying a house, so saving up for neuters and a down payment on a house is taking a while...but it is being done! we've recently decided not to breed, so that is why they weren't fixed at 6 months. For the rest of the dogs that I have in my life, they will be getting fixed as soon as I get them or as soon as they're old enough - we are going to start fostering! Yay! sorry, I didn't mean to steal your thread...just thought I'd mention why they aren't fixed, and it evolved
