I see. Well, that’s awful.
Just to balance the bad pet owner stories, I present the following. I was at the vet’s with one of my cats recently, and he showed me a kitten that was being treated. Seems a guy found it sick and brought it in, plunked down $250, and said “do what you can”. And it wasn’t even his cat. Seemed like it was a cute little thing, and the vet was going to pick up any more costs and adopt it out.
We had a 20-something guy bring in a kitten he had found on the side of a busy road in very bad shape. It was missing the lower half of its right front leg, and had apparently been injured quite some time ago. It was totally wild - screaming, hissing, spitting, biting, and clawing. The poor kitty had to be sedated (with gas) to even be examined. The leg was in pieces and kitty had many other problems as well, so it was put to sleep. He didn’t hesitate to fork over the $120 or so that the vet charged. I patted him on the arm and said, “Sorry we weren’t able to save her, but you did a good thing today.”
My grandfather was like that. He used to raise a lot of money for the Sacramento SPCA, and ran their used book sale for years. I heard the story at his funeral that he found a kitten in bad shape in a dumpster. He took it to the shelter, gave them the kitten and a check for $250 and said “this kitten is going to live.” The kitten pulled through, stayed at the shelter, and became their dog-testing cat. They used him to see if dogs could be adopted out to homes that already had a cat.
My grandfather had his faults, but he was the best friend a cat ever had.
Your grandfather was a great man.
Please say they use a fake cat before introducing the real cat to make sure the dogs don’t…I don’t even want to say it. 
I don’t think that they need a fake cat. At my shelter, they have already tested the dog for aggression, and mean dogs don’t get anywhere near the cats, or people for that matter.
They don’t just throw the poor kitty in with a slobbering beast. They usually show the cat through a glass door, then work up to face time if the dog seems calm.