Rooster with nerve damage in the foot.

We have a neighborhood rooster that mean boys chased around and shot 3 times with a .22
I work at a vet clinic so i took him in. Two bullets grazed his leg and 1 got him in the butt. He could still walk (limping badly) but we stitched him up and wrapped the leg, and nothing looked too serious. For two days after he was shot he could stand and walk. Then I noticed him sitting down a lot. His foot on the shot leg is now paralyzed. Vet said it's either nerve or tendon damage.
He's eating, drinking, pooping, happy as can be. Vet said to give him a week, and if it's not healing by then his chances are slim to none.


Does anyone have any suggestions on helping nerves/tendons to heal quicker or more successfully?
Open to any thoughts or suggestions.