I'm sorry to hear that Nala is now limping. You mentioned
some time before that you could hear popping & cracking
sounds when she walked. I didn't want to say anything but
Buddy had the cracking sounds when he walked too. It was
before his first knee surgery. His kneecap had slipped out of
place because his tendon or ligament had torn. (The Vet had
suspected a sprain at first). I hope this is not the case with
Nala & she gets to feeling better soon.