How the hell anybody can garuntee anything is beyond me. It's just probability and how good you are at estimating that probability, but no one can give me a 0% probability of any dog jacking. That little bit of knowledge ain't gained through digging terriers, it's a fact of nature.
Now, when somebody garuntees a dogs performance, to me that simply means they have a lot of confidence in their animal. How much confidence I have in the animal is down to how well I know the person I'm talking to...
In my limited experience, there are dogs that your confidence grows with very rapidly and th