There is a lot of focus in this thread on the pain of docking. However, the evidence is that very young puppies don’t experience pain as they are not mentally developed enough SEE HERE. The author of that study remains opposed to docking, as he says it interferes with canine communication. It’s fair to assume that it does, though there is very limited scientific work on it. However, if a dog is left with a decent length of tail, it’s unlikely to have too many problems making its feelings known to others: the Scottish solution, of allowing the removal of a third of the tail, leaves long-tailed dogs like spaniels and HPRs with more tail than many breeds are born with. And let’s not forget that the tail is not the only means of canine communication: facial expression, stance, movement, vocalisation and scent all have a part to play as well.
So, what about neuromas? Most of the science so far has focused on pigs, which are born in a much more developed state than dogs and so might not be comparable. My own experience with docked dogs is that tail hypersensitivity is unusual, but my experience is only anecdotal and my sample is not large. I’d be genuinely interested in a study of the rate of neuromas in docked dogs.
My equally anecdotal experience of tail injuries indicates that they are very common in dogs from working lines of spaniels and HPRs even when they are kept as pets. There is a study showing that such injuries are very common in these dogs when they are worked ABSTRACT HERE. These injuries are persistent, recurrent and difficult to heal, and cause the dogs considerable pain and exercise restriction. A proportion of such injuries will lead to tail amputation. This is a major operation in an adult dog, and can take up to six weeks to heal.
The way I see it, it’s a trade-off. It seems pretty clear that some dogs will suffer persistent pain from neuromas in docked tails, but we have no idea what proportion, or how severe the pain is likely to be. There is a stone-cold certainty that a high proportion of undocked dogs of some working breeds will suffer painful and persistent injuries to their tails. The answer to me seems to be to long-dock, so that the dogs still have plenty of tail for communication and balance, while minimising the risk of injury.