As a puppy, my Golden Retriever had very loose hips, as is common with Retrievers. I read several articles that suggested high doses of vitamin C and others that recommended glucosomine and condroitin.
I started my dog with 2000 mg of Ester-C for 3 days , then 1000 mg for 3 days, and then 500 mg a day. I also give her an omega-3 fish oil gelcap, and 500 mg of glucosomine sulfate daily.
My vet was amazed at the improvement. My dog is 7 years old now, and has strong hip joints.
This has worked for me and my dog. You should research yourself and check with your vet before starting any such program.
Source: This is just one article in my research:
By Vin from AZ