I feel the same about rescues. My cats are from Cats Protection, our first dog Lucie came trotting in to the nursery where I taught along with all the children one morning. She hung around the school all day and no one claimed her so I took her home. We had her for 14 years. Then we had Boris, a Jack Russell, a poundie who was rescued from 'death row' in the nick of time. It was heartbreaking that he didn't have a long life, but he had nearly five happy years with us. We got Mandy our Irish Terrier (she was advertised as a Jack Russell!), from a man who lived in a horrible first floor flat and was a lorry driver. I think he was going to use her for rat catching, so we feel we did rescue her. She's a wonderful companion and loves her creature comforts.
Feel better soon.
Love, Tabby xxx