Arthritis supplements shortchange pets, test finds

Arthritis supplements bought by millions of pet owners for their dogs, cats and horses sometimes skimp on the ingredients the makers claim can help aching paws and aging joints, and some contain high amounts of lead, an independent laboratory found. Four of the six joint supplements for animals tested by ConsumerLab.com lacked the amounts of glucosamine or chondroitin promised on their labels or had other flaws, such as lead. Wider testing by a trade group of 87 brands found that one-quarter