For the past 2 days we have noticed that our youngest cat, seems to be
getting cramp in one of his back legs.

The only thing i can think of is that its something like cramp that he
is getting, as he will be walking about fine, then when it happens he
starts to backup lifting his back leg.

Ive check the leg he gets it in and theres no signs of it been swollen
and it dosent seem to hurt him when touching it. apart form when he gets
the cramp if you pick him up to try and rubs his leg he starts to fidget
if his leg is straghtned.

Has anyone else come across this, its never happened before.

Thnaks