Everyone keeps telling me I did a good thing by neutering my dog... so what's the big deal about leaving your dog unaltered? Is it just the chance that the dog might father babies unexpectedly? They are really big on neutering/spaying in the city, there are campaigns happening in all the pet stores and they don't let dogs or cats leave the shelter unaltered. Is it really so irresponsible to leave your pet unaltered if it's kept in the house/yard most of the time? 
...Just curious if there are other reasons?
...Just curious if there are other reasons?