I am not going to neuter my wolfhound, ever, unless it is medically necessary. The risks far outweigh the benefits in my mind. I will never willingly neuter another male dog of mine. I don't see any benefits and see lots of negatives. If they come from a rescue, I don't have an option. As far as females, I don't think I will spay another one. I know I could keep them separate, so breeding is not an issue. The problems I have had with spay incontinence as well as increased risk for cancers, behavioural issues, etc. are just not worth it to me. I think each pet owner has to decide what is right for their pet and go from there. It is no different than deciding what to feed your pet, what training to give your pet, what is acceptable behaviour for your pet, or any of the other decisions we make as pet owners. You make your decision and then you have to be prepared to live with the consequences, good, bad or indifferent.
Kathy