I have two senior dogs both 11, a springer and a Dalmatian with the springer suffering from arthritis in his back legs and hip, he gets really stiff in the winter months, especially the next morning after a cold night as he prefers to sleep outdoors. My Dalmatian doesn’t like the cold weather and just wants to come back inside and then shivers for over an hour after in her bed. I ordered 2 large waterproof fleece covers and they have been fantastic. The springer is no longer stiff after wearing it all night and the Dalmatian loves getting her a blanket on now and runs outside to play with the other dogs. Thank you Red mills, I would highly recommend this rug to anyone.