I give these to my two dogs for joint stiffness and early arthritis. They both like them and there's no side effects.
We've been giving our 12-year old Shiba Inu one every other day for the past four months. He's much happier and active. Night-and-day difference. No problem with his eating them; add it to his dinner meal.
The biggest factor in my glucosamine search has been trying to find the most palatable option for my picky dog. I love him to death, but he's a stubborn sh-t. And he will actually eat these! They don't smell too horrible or leave my hands feeling gross either. For my dog's size, he's supposed to start with 3/day, but my biggest complaint of these is they're very expensive. At 3/day that would be almost $50/month. I've been doing just one so far and am expecting results similar to any other glucosamine/chondroitin product. If you're looking for a palatable option for a picky eater, then I definitely recommend these!