I have one male and one female that is not neutered/spayed and one female that is spayed. The male won't be spayed, I will be breeding him and the female I am not sure yet whether or not she will be spayed. I would have to say that if you are not going to be breeding them, then they should be spayed/neutered.
Here are a few pros and cons, there are so many, but overall the pros for having a neutered/spayed dog are much better and outweigh the cons for having a unspayed/un-neutered dog.
Cons of having a male that is not neutered consist of marking and peeing on everything, humping, can develop cancer due to not be neutered or bred, may have some aggression, territorial to other dogs, if a female is in heat he will try to get to her and run from you.
Cons of having an unspayed female consist of blood on floor, constant licking, all male dogs will be attracted to her, she will try to run away when she is in heat, tend to be snappy or grumpy through the whole thing, risk of developing cancer is high because she is not bred or spayed.
Pros of a neutered male are he will be more loving, possibly no marking, no humping, the risk of cancer developing decreases dramatically, no aggressive or territorial behaviors that are induced by intact male dogs, will be more playful rather than trying to get to a female.
Pros of a spayed female are no blood or stains, no sneaking out or running away to find a male, mood is much better, risk of developing cancer dramatically decreases, you can now take her with you without worrying about male dogs trying to get to her, no chances of unplanned or accidental pregnancies.
I hope this helped!!
