
Depends on their weight thats what my vet said...
Mine range in weight from 24-28 pounds boston terriers. We were just on the 500 and I was told I could give 2 pills a day. I have now changed to 900 mg extra strength.
Glucosamine Sulfate 500mg
Chondroitin Sulfate 400mg
I only give this once in the morning which I to also take only once. Its the Life brand. It has no lactose, sugar, gluten or starch.