Claws on ONE paw don't retract?

The claws on my 17 year old's back right paw are always extended, but she is able to retract the claws on her back left paw (she's front declawed). Anyone had this happen with their cat? Another thing is that, when I touch the back left paw, she jerks it immediately out of my reach, but when I touch the back right paw (with the extended claws), she growls and only slightly moves the paw. She walks normally (well, as normally as a vision-impaired, arthritic cat can walk) on both paws; she doesn't limp or anything. I'm going to ask the vet about it, but has anyone else's kitty had this happen?

Mainly just bumping this up for you since no one has responded, but wanted to know if this is NEW?  I'm guessing so, but wanted to clarify.  And if so, are you thinking that maybe she's losing the feeling in that foot or something...that's why she isn't jerking it away from you quickly too?  Possible neuopathy?  Is she diabetic?  Just throwing things out there!

Well, I only noticed it recently, but she might have had the issue for a while and I just never noticed. The vet said she might have some residual nerve damage from the stroke she had two years ago. She walks okay, so I'm not going to worry too much about it.

Our old cat had problems with this. She ended up not being able to retract any of her claws. The vet said that it was due to arthritis of some kind.