Why do breeders such as myself contractually prohibit declawing? The answer is simple - the procedure is brutal, cruel, and typically done for convenience sake. The U.S. is the only developed country in which declawing is legal. In most countries it is considered animal cruelty.
Imagine someone cutting off a person's fingers because they are biting their nails. Then expecting the person to act completely normal after and being expected to not just trust but love the person who has done this.
While people often think the cat's have their claws removed, this is incorrect. In order to be declawed, the entire last digit of the toes are removed and tendons severed. Cats who have been declawed often become averse to the litterbox because their feet hurt and frequently become prone to biting since this is now their method of defense.
Cats do not just use their claws for defense. Cats walk on their toes and they are used for balance. Scratching is a form of communication and exercise. They are stretching their legs and back in an isometric type exercise.
For more information on declawing click here. Additional FAQs are found here