Sorry to hear that Pepper is out of sorts, I do know of a couple of local dogs who have had the shivering and lethargy thing recently, but that was coupled with being off food also. They're ok now. It is suspected they picked something up from the constant walks thro' filthy water and endless mud we 're all subjected to at present. Is Pepper wee-ing and poo-ing ok? It's always a worry but if Pepper is in some discomfort that maybe creating the symptoms. If nothing else changes I would give the anti inflammatory tabs a couple of days to work, but if no improvement, a return trip to the Vets. here's hoping Pepper picks up quickly. M