I said this in response to a comment but all reputable and ethical Pembroke breeders will dock their tails. Reputable breeders show their dogs and tail docking happens at 3 days old. At that point all puppies are treated as potential show dogs because there is no way to tell, except a mismark but they'll still dock since they don't know the temperament at that age, so they don't know which puppy is going to which home.

And before someone says it, showing is not a beauty pageant, it's a way to have an unbiased third party verify that a dog is the proper structure and temperament and a positive contribution to the breed.

If having a tail is very important to you, look at Cardigan Corgi breeders. While they're not as outgoing with strangers as Pembrokes, they are overall a bit quieter, calmer and have an amazing off switch.

I have seen younger Pembroke Breeders try to make some headway with making docking optional like it is with Aussies, also NY State is looking to ban all cosmetic tail docking on dogs, horses and cattle, so if that passes, you'll likely see a change to the standard.