Hi
@Denise Hammond 
Welcome To BYC
I'm sorry you are having trouble.
Do you have vet care available?
I agree with the others, it looks like you may be a meat bird. He may have a leg bone deformity like Valgus Varus or Rotated Tibia (which is a variation of Valgus Varus). This can also be seen in "non meat bird breeds" as well.
Unfortunately, there is not much that can be done to correct a leg bone deformity and it will most likely worsen over time.
It's possible it could be injury related, but without a vet to perform some xrays it would be hard to determine what's going on.
Do the best you can to make him comfortable. He may struggle to get to food/water, so make those easily accessible to him. The flock may eventually start to pick on him, so keep watch for that. Depending on your chicken keeping goals (breeding), you will not want to use him for breeding unless you do find that it is definitely an injury.
Reference:
http://www.thepoultrysite.com/articles/1051/leg-health-in-large-broilers/
https://www.merckvetmanual.com/poul.../noninfectious-skeletal-disorders-in-broilers
https://www.researchgate.net/public..._of_the_intertarsal_joint_in_broiler_chickens