I would certainly be concerned if I had an animal that had to be lifted with a tractor to stand and then falls down. Does he lay in his excrement and urine? Also, the female who isn't eating much and lays down a lot would also send up red flags that something is wrong. Have they been seen by a veterinarian?I have a llama who can't stand up except when I left him with the tractor, then he is Ok til he tries to move, and he falls down.
He is eating ok.
I have another llama who spends a lot of time lying down but can get up and move about. I don't think she is eating much.