Meriam, I hesitate to give you my personal opinion, because I fear it would not be very heartening. I'd like to ask you though, if you could provide some additional information such as ... How old is your dog right now? ... and ... Did the vet indicate what the estimated cost for this THR would be? This would at least allow to do an objective cost-benefit assessment for you. Good luck with everything. We've all been in this situation where we have to make a tough and unselfish decision. Never easy. :( Dan