I always say, nobody can guarantee a pup to turn out, healthy and it's personality is about the only promise anyone can make and sometimes that goes wrong. We all like to think they will all turn out but,...don't mean they will. If you are doing right in your breeding program then you should have some clue if it may or may not work. If we could guarantee them to turn out ,then we would all keep the ones that are going to make it and wouldn't have to worry about making anyone else happy.
You have to many people that are in a hurry and try to start these young guns up to young or they try them to hard the first time and ruin them. You also have lazy slack asses that chain their pup to a tree and toss it a blanket to sleep on, a water bowl made from a cup in half soda bottle and throw it some dollar store feed here and there.
Also as far as grown dogs go...you can guarantee a match dog but, to guarantee a win is wishful thinking . To many variables to take into consideration such as care before and after, quality of keep and the opponent. Everybody likes to think they are going to win but,...it's not guaranteed as the competition is probably thinking the same thing.
If you have a dog get loose and run through the yard it really means nothing. If the male got on a female, maybe she reached out and grabbed him and he don't like to abuse the ladies. I've had one get off his chain and wander around the yard and never touch another hound but, drop him in the woods and he knows what time it is.
Then again I've also had a couple get off their chain and kill another hog on the chain and when it came time to hunt...wasn't interested. Yard accident shouldn't be a way to judge what one will or won't do...You weren't there to see it so, you have no clue as to what really went on.