Help Sammy keep on truckin’ on all four legs

Sammy is in pretty good shape for a senior dog. The mixed-breed dog, in the care of Saving Graces Rescue Foundation, a Huntington Beach-based nonprofit, shows no signs that, although he’s older, he’s slowing down. He is a small guy, and smaller dogs tend to live longer lives than bigger ones.
Sammy’s blood tests show that his organs are functioning properly. X-rays show no problems. He’s healthy, except for one thing: his back.
His rear end is weak, his foster mom, Lisa L