A high quality food is a good suggestion and I have found shark cartillage is also a great supplement along with the glucosamine. I agree a larger dosage for your dog would help. Also if you have a piece of solid foam not to soft to sleep on this will help too
A dog has so many friends because they wag their tails not their tongues.
R.I.P. Buddy 2002-2008 The best Mastiff ever.
Now owned by Clark the Crazy American Bulldog