I think the most frustrating thing is that the cats' owners do not think that there is any problem with their animals trespassing. The next door neighbor with the hound also has a black cat with a pink collar. It used to come in our yard but one day, I didn't realize it was out in our yard and let the dogs out. They were very excited to see a "friend" in their backyard and rushed to greet it. It took off over the fence. Then I could hear the neighbor cursing my dogs for scaring her cat. GRRRRR! Her cat was trespassing on MY property. Her cat doesn't come into my back yard anymore but does sleep on our welcome mat on the front porch.
A couple of weeks back there was an episode of Judge Judy where one neighbor was suing the other for vet bills incurred when their Basset Hound was badly scratched by the neighbors cat. The neighbors were counter claiming for damages to their cat. The Basset owner won the case since the cat had come onto their property. Judge Judy explained that the cat had no business on the neighbor's property and any all damage caused by their cat while illegally trespassing was their responsibility irregardless of whether the Basset chased or attacked the cat while it was on their property. The cat owner was furious saying it was unfair, cats roam. That is the problem, some owners just won't take responsibility.
I just get so furious about irresponsible pet owners. I work so hard to take good care of my pets and keep them happy, healthy, and safe.