As I said in a previous post, I think catching and killing song birds is probably more a recreation for well-fed pet cats than it is a source of nutrition for truly feral cats - small rodents are more plentiful and easier to catch. Still, feral cats pose a number of other problems which might justify killing them. Catch and release spaying/neutering might be just as good in the long term - the biggest issue is irrsponisble idiots who keep releasing more cats into the wild.
One this point we agree.
“the biggest issue is irrsponisble idiots who keep releasing more cats into the wild.”