What's the dosage for an adult male dog around 100 pounds? And is it safe to give him a human glucosamine & chondroitin supplement?? I started him on kelp, alfalfa, probiotics, and fish oil supplements. He seems to be itching more and biting at his skin. Not sure why. But he's been limping on his left leg for 3-4 days now. I just want to get him on something that could help. Thanks in advance.


