PLEASE help Mocha

Mocha, a German Shepherd cross has a torn cruciate ligament in his left knee.  He can't put weight on it and his right hock is fused so he really can't move.  Paul and I (Angie) are both on Canada Pension Disability and we're barely getting by.  He is our child. PLEASE HELP MOCHA AND US.  Any help would be greatly appreciated! !