Zach gave us kind of a scare. He had been happily running on the beach for hours at a time all week, and then mid-day Friday he started acting sluggish, to the point Friday night where he almost couldn't move at all. It was very upsetting. We rushed home Saturday and got him to our vet.
$400.00 later, they had ruled out a bone break or arthritic joints, but he did test positive for Lyme. He's on an antibiotic treatment for that, as well as anti-inflammatories, and he seems slowly to be returning to normal. But it was scary!