Peachick leg injury

[MamaPeahen]

I have a 5 month old peachick, and he recently began limping. One day, I noticed it had gotten worse and there was a clicking sound every time he took a step with his right leg. When I looked at it, and how it moved, I saw it was popping in and out and shifting at the knee joint.
I have tried researching, but haven't found any case quite like it, it isn't dangling, and he could move it, but it's been causing clear discomfort and I fear has become more painful with the cold weather. His toes don't spread and it seems like he tries to avoid putting much weight on it, but the swelling is getting much worse and he has torn off the bandages we attempt to put on him.
If I had the money, I would definitely have taken him to the vet, but unfortunately I don't have those kind of finances. It seems like it might be dislocated there, but I'm not quite sure what I should do in this situation. Is there a recommended way I should splint it, and would it require relocating the leg? Do I need a professional?

I want to help my little boy, so any help is greatly appreciated, thank you!!

 

[MamaPeahen]

I forgot to mention that we've been wrapping his leg with gauze bandages, in order to try to keep it in place.