How much Glucosamine Chondroitin should I give my 25 lb.dog for joint pain?

The standard amount of glucosamine and chondroitin that should be given to your dog is 20mg's per pound of weight, so in the case of your 20lb dog the amount of glucosamine and chondroitin would be 500mg's.

You should try getting a supplement that also contains a natural anti-inflammatory such as MSM alongside glucosamine and chondroitin to help ease the pain and swelling that so often occurs with joint pain in dogs.