Oh my god they done the same thing in my neighborhood. There was this cat that me and my wife were feeding and one day she gave birth to 5 kittens; 3 orange and 2 calicos, she kept them in our back yard and we would watch her nurse them, but a few days later she moved them. The following week, my neighbor who doesn't like cats, he hired this company ("Humane" Animal Removal) to remove the felines from our block. They trapped that mother, and they refused to let her out of the trap even after we explained to them that she is still nursing. About a week after they took her away, my neighbor who lives a few houses down from me found her 5 dead kittens who all starved to death in the bushes in her back yard. I was the one who had to come and bury them after they died. What a shame, I was planning on having her babies adopted the moment they were old enough to eat solid food, and then loan a trap from a friend and trap the mother to have her spayed. I would have spayed her sooner, but I assumed she was already spayed because non of the males in the neighborhood would ever bother her, she was a fluffy cat so we really couldn't tell she was pregnant, until it was too late.