Hello,
Any degree of limping that lasts for more than a few days should be seen by a veterinarian. The only exceptions to this is a dislocated hip which should be seen immediately to try to put it “back in the socket”. Infection is the other thing I worry about. There is usually wound and most often pets are quiet and not eating well.
The most common knee injury we see that causes limping is a cruciate rupture. You will need a vets help to diagnose this.







Hello,
I would be worried that your cat is not eating enough to form feces. You should see your vet do them to help you with either an appetite stimulant and dietary options to help encourage eating. They also need to do a thorough examination.