Found this:
"Why is declawing bad? Declawing can cause paw pain, back pain, infection, tissue necrosis (tissue death) and lameness. Removing claws changes the way a cat's feet meet the ground and can cause pain like wearing an uncomfortable pair of shoes. Improperly removed claws can regrow, causing nerve damage and bone spurs."
https://www.humanesociety.org/resour...0bone%20spurs.