Poor Old Rusty

We live with a Pembroke Welsh Corgi named Rusty. Those of you who have followed my poetry for years have read about Rusty several times in my poems. Rusty will be 15 this December 9th, and he is on his last legs literally. His hind legs collapse now when he walks so that his walking consists of a series of falls sideways at the back end. It breaks me heart to see him so old and incapacitated. I know what I will have to do all too soon now... Rusty was always so active, running and jumping so high. Time has treated him cruelly. He acts like an old man in his 60s. Say, I turned 64 yesterday.