Our neighbors two houses down have Mama Chiba and the kittens, but they don't feed them or let them inside their house. They put flea collars on the kittens when they were little, but since then I've not seen any flea medication or anything on them (but they have fleas).
We feed ferals, and the four cats eat out of the food bowl along with the ferals. Mama Chiba has found our unfinished basement/very small laundry room (think the dirtiest, smelliest place you could ever find, she's up in the unfinished part, not the usable part), and now sleeps there at night.
What would you do in this situation? The cats also are not fixed. What could I say to the neighbors?