I had an old witch that lived next to me that was starving her own cat to death. One day I came home and the cat was laying in my driveway and it was so thin I could see all of its ribs. I thought it was already dead because it didn't move when I pulled in. So I backed out of the driveway, drove to the store, and bought some milk and cat food. I left bowls of each in the strip of lawn between our houses.
The next morning I woke up and the bowls were right outside my front door, turned upside down. The cat food was scattered from my door to the lawn. Clearly, I had overstepped my bounds in her mind and she dumped it all out so her cat couldn't eat or drink it.
So I took to leaving the food out on my property only in places where she wouldn't find it. The cat lived for a few more days but I think the damage was done and the cat just disappeared. Thankfully, the old hag died a few months later in her house all by herself. I know they say not to speak ill of the dead, but this lady was a hateful, angry, harpy and I wasn't sorry when her story ended.