OK, cat people, I ... well actually we, i.e. Mother, the cats, and I, need
some guidance from the best cat thinkers on the planet.

(snipped)

I know you think your mom is doing the cats a kindess by feeding them; but
think about this. She is simply attracting them to her property, where they can
continue to breed, and risk exposure to antifreeze poisoning, (one of the most
horrible deaths you can imagine),) and cause problems to your neighbors. Please
do the right thing. Trap the remaining cats. Take them for spay/neuter and find
someone in the country to adopt them, or someone who is willing to spend time
taming them enough to be house cats. You're just setting them up for suffering.
Your cats don't have a right to roam all over the neighbor's property. Your
continued defiance is only going to cause the neighbors to take out their
frustrations *on the cats*.

Sherry