Collagile® dog 225 g- biactive food-grade collagen peptides

I got this for my elderly 3-legged dog. After one dose he seemed much more active, but I think that has to be coincidence, surely it wouldn't take effect that quickly! However , he still has it in his food and is still retaining condition, so will carry on. It did take a while to get here as first package was returned due to damage in transit, so had to re-order.