Limping

I have two fixed male cats. One 7 and one 1.5 years. They both occasionally go outside. The 7yr old came inside Thursday evening and was limping. I watched him and called the vet Friday morning. First appointment available was for Monday. Today is Sunday and he has been inside resting eating normally and is no longer limping but the 1.5yr old is. In the same left rear leg. He meows in pain when I picked him up and won't let me touch it. He was inside all day today and had been fine until this evening. Any thoughts?

Have they recently had any vaccines?

Nope no recent vaccines. It's been cold here we live in Massachusetts but other than that nothing out if the ordinary. They don't stay outside for long periods.

See if he will let you check is pads. Since it's so cold up here in the northeast US they could have a case of frost bite on their paws.

Thanks south for the advice guys. Both cats are putting weight on paw and walking just fine this morning. Guess the younger one was jealous if the special treatment the older one was getting while limping so he was faking lol. Hope they stay ok.