Meep's 11 now.  She was born with somewhat deformed hind legs (warped
bones) - not terrible, but she's about as cow-hocked as a cat can get,
when she walks she swings her hocks around, and has very narrow hips.
She also has luxating patellas, though hasn't had a problem with them
for some time.

She's always stretched out her hind legs after getting up from sitting
or laying down, even if only for a short period.  As she's only the
second cat I've ever had, and very different from the first one, I
really have no idea if this "every time" stretching is normal or not.  I
suspect she's putting those patellas back where they belong.

She didn't have any arthritis when the x-rays were taken that diagnosed
her kneecap problems (two years ago?)... but, she gets a joint care
glucosamine additive in her food every night... it's preventative, but
also for her cystitis.

I've noticed that just recently, she's taken to lying on the tile
floors, something she used to only do when she was hot.  Sure, it's hot
outside - this is Australia after all, it's 40c (104f) outside - but the
AC's working fine & she's an indoor cat.  If I put my hands on her hips,
they're just slightly warm.  In a horse (my area of expertise) this
would be a sign of problems, but no idea if it is in a cat as well.  She
doesn't seek out her 'reflected heat' pad, as I'd have thought she would
if she was arthritic.

She has no obvious mobility problems, runs and jumps, etc per normal.
Aside from me noticing the warmth, and her lying on tile sometimes,
nothing has really changed in some time.  Going to the vet is pretty
traumatic, so I don't want to take her in unless necessary.

Just looking for any opinions:  Could there be a problem here, or am I
just being hypersensitive (I tend to be hypochondriac about my cat)?

jmc