How many breeds dock?
Affenpinscher
Airedale
Australian Shepherd
Australian Terrier
Black Russian Terrier
Border Terrier
Boston Terrier
Bouvier de Flandres
Boxer
Brittany
Brussels Griffon
Clumber Spaniel
Cocker Spaniel
Doberman Pinscher
English Cocker Spaniel
English Springer Spaniel
German Pinscher
German Shorthaired Pointer
German Wirehaired Pointer
Giant Schnauzer
Glen of Imaal Terrier
Irish Terrier
Kerry Blue Terrier
Lakeland Terrier
Miniature Pinscher
Miniature Schnauzer
Norfolk Terrier
Norwich Terrier
Old English Sheepdog
Parson or Jack Russell
Pembroke Welsh Corgi
Poodle
Rottweiler
Schipperke
Sealyham Terrier
Silky Terrier
Smooth Fox Terrier
Soft Coated Wheaten Terrier
Spinone Italiano
Standard Schnauzer
Sussex Spaniel
Swedish Vallhund
Tibetan Terrier
Toy Fox Terrier
Vizsla
Weimaraner
Welsh Springer Spaniel
Welsh Terrier
West Highland White Terrier
Wire Fox Terrier
Wire Haired Pointing Griffon
Yorkshire Terrier
From the AKC site, so I apologize if I missed any (obviously doesn't include any non-AKC breeds). Almost more breeds are docked than are not. I personally own Pembroke Welsh Corgis, my last two have been natural bobs. My current corgi, Willow came from a litter of 7, with 5 natural bobs. Still, if I put her in a show ring, she would probably be penalized because her 'bob' isn't as clean. My other corgi was 're-cut' even though she was a natural bob, to conform with the show ring presence. Still, I think breeding for natural bobs is great!
However, I have done dewclaws and corgi tails over the years and really don't find it offensive. It isn't traumatic to the puppies. I don't think I am 'seriously disturbed or need help.' I care very much for my animals. But it is a personal choice at this juncture, so do what works for you. Doing ears is a totally different scenario and I really would like to see less of that. I helped a friend with her Dobie puppies on way to many occasions, and no matter how loving and caring she was about her dogs, I just couldn't see putting my puppies through that. (She never sold her puppies until after their ears were done & pretty well healed because often pet owners don't take proper care of them.)
As to the contract, great idea. Just keep it simple. As someone else already said, they are normally only as enforceable as the people you sell your puppies to. I've been giving back 'spay/neuter' refunds for YEARS. Used to be $100, but now it's $150. Makes it almost a no-brainer for the pet owner to go get it done ... most of the cost is covered. Offer good to one year, no breeding prior to spay/neuter. I might recommend a vet, but not require it. I don't care how much you like your vet, but I would personally only take my animals to a vet I was comfortable with. Besides, not all your puppies will be sold to within 50 miles of your home, so it would be a hardship on some.