Let me be more specific. Bob is raising his grandson after his daughter passed away. About a month ago,these kittens began showing up in his yard,first one then several. Bob,his wife,and his grandson feed birds and have a garden. But the kittens are taking over the yard, seem to be hankering for bird a la carte,and along with a groundhog,have made the garden look like a scene from Calais! In 1944. Now Bob doesn't SEEM to be a guy who'd resort to shotguns or worse,but before he does anything rash,I told him I'd do some research. It seems ferals this young might be easy to home...?
How old are the kittens? You could try trapping, socializing, and rehoming them, if you're up for some work or a local rescue would take them. If nothing else, he needs to TNR them so that he won't end up with even MORE kittens taking over his yard.