This is the very reason I have not talked to my sister in going on 2 years.
We had a rescue Shiba Inu named Kiesha, she was 9 when I was given her by her owner. She was originally a breeding dog and was sold as "a best friend" to the rotty this lady bought, she never really wanted her, and when she mentioned to the vets back home that she wanted to get rid of her they gave he my number. So I had her for a couple of months, when my sister showed up and met her, and asked if she could have her, I said yes. And all was fine for 2 years, hen sis went through a divorce and left Kiesha with her ex, as the apartment would not allow dogs. My sis went to her ex's to pick up their daughter and he was not home yet, having gone out of town, and found Kiesha tied to the back step with a bowl of food and water, that was how he let this 11 year old dog for the weekend. Dear old sis loved the dog enough then to take her and bring her to my parents house the next weekend. My folks kept her for a couple of years, but they retired and moved into a bus (the big conversion buses that people live in) and Kiesha didnt travel well so she came back to me, which was fine. Kisha by now is 12, and spent another year or so with me, and dear sis was in a new stable relationship and her and "new man" wanted Kiesha back, to which I said yes. By now Kiesha was having back issues, there were days that she could do nothing but lay down, the vets said operating was an option, but with less than a 50% chance of changing anything. They had her for another year roughly when I got a call from my mother telling me that she had put Kiesha to sleep, which I was fine with because her back had been bothering her, only to have dear old sis let it slip that she DROPPED THIS POOR 14 YEAR OLD DOG AT THE SPCA, WTF??? My mother lied to me to protect the sister, preventing me from saving Kiesha??? She dropped her off as a stray so she would have to pay the fee, thus leaving the poor dog to have to sit there for 3 days shaking before she could be euth'ed??? And when the bitch told me the reason she did it was because Kiesha shed??? She shed???
So ya I wish poor old Kiesha had has someone compassionate enough to do what you are going to do for these poor old souls. This August will mark the 2 year anniversary since my last conversation I will ever have with my dear old sister. I thank you for doing this in memory of Kiesha.