My older dog get it regularly when I am working on getting her in shape for hunting season. I have found that she will recover in about 2 days if she is allowed to rest and kept calm. However my 1 year old puppy has never experienced it yet, I think she is way to high energy. I have swam her for 1.5 hours throwing the dummy and she never slows down. It is good to know what it is actually called because I always tell my wife they have broken tails!!
Brandon