If you type Feral cats in the search bar, you will be able to find the closest group that works with feral cats and they can gett you cages that capture them without hurting them and again, get them fixed. My neighbor and me managed to do that to 6 or 7 around our neighborhood and it is now wonderful. NO MORE KITTENS. The clinic we used charged about $30 to do the work and the shots were just a small amount. It was worth the effort. Now I have had 3 kittens from one of the litters and they have 5. We enjoy them very much. One of them still hugs me around the neck and nurses on my neck. That is her "Comfort" spot.
Good luck
Peg-TX
Innova 18"