back toe-nail biting

My youngest, a 2 yr old named Bob just discovered his back toe nails and bites them! Anyone else observe this attractive habit?

[April2]

Oh yes! My cat does that all the time and it drives me crazy to watch her because she can really pull on those nails! It gives me the whillies to watch, lol, but it doesn't seem to harm anything so I guess it's just one of those little quirks they sometimes have!

[Jade59]

My cat does this too and after reading this thread, I am going to assume our kitties do this because they can't shed the nail sheath (sp?) as easily as they can the front.  The front nails are easily shed on a scratching post, tree, carpet or your couch.