I have read the posts there and am still 50/50 about getting Nicky neutered. I plan on getting another male yorkie down the road and think neutering him will be good as to stop marking all over the house(yes I am training him but it's been difficult with that.) His personality is really fistey and rambunctious. I just love the way he plays fetch, etc. But can tend to "bite" a little too much and too hard. Wondering if that's a testosterone thing or just a puppy thing I hope he grows out of. ? Any advise will help. Thanks!