I certainly wouldn't try anything before consulting a couple vets,after the reacurrance,if any.Don't worry about the lab needing the tail as a rudder.While it may help to some degree,I'm sure he will compensate with foot pressure.That's the first thing you hear on AKC shows, when a Lab comes out to be judged,the TV talking heads always state,"that big otter tail is used as a rudder".LOLMy Boykin could do 270 turns faster than you could imagine.A long tail may have slowed him down:^)