My dog is 31 lbs and is 14 years old having some joint problems in his right leg. I purchased a supplement that contains: Active ingredients 400 mg chondroitin, 500 mg glucosamine, 100 mg MSM, and 5 mg manganese. I am only giving her 1/2 tablet - could she have any adverse affects from this supplement; i.e., diarrhea or upset stomach??

