Knee surgery for our beloved puppy Onyx Stone

Hello everyone. It comes with great desperation and heavy hearts to ask for help. Our beautiful puppy has developed tibial crest avulsion in both of his rear legs. Not knowing that it would be due to genetics or growing too fast. We've done our best to keep him and his surroundings safe and that still wasn't enough. We never saw this coming and it breaks our hearts to see him in so much pain. Pain to walk or even use the bathroom. He will be undergoing surgery at our expenses but we cant do it alone. If you love animals including innocent puppies. Please find it in your heart to help. Anything will be truly appreciated.