hi we too have a parrot with severe disabilities. His right leg has been broken as a nestling and no one notied and its healed at 90 degrees to his body. So as long as he always has a cage side to hold onto (he has full grip in all toes) then hes fine. his good foot is not so good either, the leg is weak and he walks on his hock, and he has three toes pointing forward and one back so not good for grip! That said, he manages well and loves cage climbing rather than perch climbing. ive wrapped flat perches in vet wrap to make it softer on the parts of his leg that are in contact with the ground. ive put shelf perches instead of normal perches and removed the horrid grill from bottom of cage so he walks on the newspaper. this means 2 x a day cleaning out but thats no big deal. the BIGGEST problem ive had is finding a new cage with horizontal fronts. unbelievably all but two models have vertical bars and he cant cope with those atall. Finally got him a new jersey and hes having a blast. Ocassionally he slips and lands on the floor but he never seems phased. our saddest feeling is that we can never have the pleasure of him sitting on our hand or stepping up like out old bird used to, as he just doesnt have the confidence to try it because of his feet. its sad for us but im guessing he doesnt care too much lol