<human>: Can you condense the text into a few key points?

There is a feral cat family of two adults, two young cats in our backyard.  They were here before we moved in, and I started feeding them 6 months ago. That means, for the last 6 months, they've been getting grocery cat food from me every single day.  They are ever-present in the yard, just hanging around until I feed them again.  They sleep under the neighbor's house.

Feeding them has attracted the attention of at least 4 other feral neighborhood cats, who prowl through the yard regularly, though I've never actually fed them directly.

Here's my question: is it ok to just stop feeding the family?  Will they starve to death after depending on me for 6 months?  Sometimes if I miss a day they will yowl horribly until I feed them and act starved.

I want to stop feeding the family because it is starting to attract too may cats, and I don't want all these cats to deter the birds from my bird feeder.  I kind of like the cats, but I enjoy the birds much more.  I kind of wish the cats would just go away so I could enjoy more birds.

Before I started feeding them, I saw the momma cat killing lizards and giving them to the younger cats, (who were just kittens when I started to feed them.)  Is it possible that I've ruined the younger cats' skill of hunting and killing for themselves, and if I stop feeding them, they will die?

Btw, These cats are totally feral, you can barely get within a foot of them, I've never been able to even come close to touching them.
<bot>: Would it be cruel to stop feeding feral cats I've fed for 6 months, especially since6 months ago 2 of them were just little kittens? And will this make them go away?