I would have the vet look at it now. If there's been some damage done, she may need it removed now so that it heals properly. If the vet thinks it will heal okay as it is, then you can at least discuss whether the surgery is necessary. If it's a bad tear, there's the possibility of an infection getting into the joint--and once it's in the joint, that's a whole new world of frustration...
"We are--each of us--dying; it's how we live in the meantime that makes the difference."
"It's not what you gather, but what you scatter that tells what kind of life you have lived!"
"Be kinder than necessary, for everyone you meet is fighting some kind of battle."