I wish I had a dollar for every time I have been scratched by a dog or cat whose nails had not been clipped.. It is very important for your pet's nails to be clipped regularly. Not only because it hurts when they jump on you and scratch you but because unclipped nails start to curl and can cause a lot of problems for the animal.
Too many people who have cats believe that since they use a scratch board or scratching tree, their cat's nails do not have to be clipped. Wrong. Cat's nails can curl back very quickly and end up going back into their paw pads causing pain and infection.