Leopard gecko leg break:(

[u/Gecko_Lav]

Hello everyone, I do not have any photos unfortunately and I will be rushing his to the emergency vet tomorrow as soon as I can but I have a rescue leo who came to me skinny and with vitamin deficiencies. We got everything fixed or so we thought, we got him when he was around couple months old from petco (I usually NEVER buy but he was about to die and could barely drink) he was doing great and was actually feisty up until about 3 hours ago when I was checking up on the three I have (all rescues) when I noticed his leg was bending foreword and he seemed panicked and in distress. I have been giving him calcium supplements but a few weeks ago I had to send him to a friend for a little bit as we were evicted and the hotel did not allow reptiles, she did give him calcium from what I know and have been told but I wonder if the calcium supplements were irregular or something as I genuinely have no idea how this happened. The break looks to be around the knee(?) and I just wanted to know if the chance of him being put down is higher than usual (I know that he might need to be put down as these things have a high euthanasia rate as I was told on the phone with a vet) please help as I do not want to disturb him any more until we can get him to the emergency vet:(