How sharp are Siamese cat's and chiuhuah dog's claws?

Siamese cat's claws are needle sharp. Siamese cats, like all domestic cats, will shed layers of claw periodically, so their claws are often renewed; plus, they retract, so are not dulled when the cat is walking.

Chihuahua's claws, like all dogs' claws, are not retractable, and so are blunted by the surfaces they walk on. While this is most noticeable with dogs that walk on city streets, because the concrete is abrasive and blunts them rapidly, it also holds true for dogs on farms. It will, of course, vary from one dog to another, but generally the chihuahua's claws will be quite rounded at the ends.