my grandson Aiden was here last night. He is about a year and a half, and he is sick and cranky. HE for the first time got a bit rough with Sancho. THat cat stood up almost as tall as Aiden and smacked his head a good one, without one toenail in it. Aiden stood their and rubbed his noggin with a look of disbelief, started to walk away, and turned around and petted nicely the cat. I checked closely and there was no scratch, not even a reddened spot. His nails are sharp, I do not cut them. We live near the woods and if he ever did get out he would need them. THat is the way the rest of the evening went, brothers at heart, playing and keeping each other company. I never met a nanny cat before, and this hulking hunk of a male cat to boot.