At what age would you think is too late to start training for hunt tests? Say the dog is 3-4 years old and has little to no training (basics are sit and come), but absolutely loves to retrieve. Max distance they've been introduced to in marks would be about 70 yards. Never been force fetched. Too late? Never too late? I'd like to see peoples opinions. I've already formed my own opinion, but I'll save that for later.