From a Newsday article dated July 23, titled, "I wouldn't have thought it in a million years" written by Bart Jones:
Neighbors know John Bittrolff as a friendly, regular guy, a devoted father of two boys who likes to hunt deer and raise animals in his yard.
A carpenter and home improvement contractor, he won friends by plowing their snow and doing odd jobs around their houses. "He's a nice guy. He's liked throughout the community," said Roger Schwarting, who has lived next door to Bittrolff for more than a decade. "He's helped everybody. That's why it's so shocking."
BBM
Plowing snow? This might mean that he was really familiar with the area. It's like landscape maintenance. The people who do these jobs often become very familiar with the areas in which they work.
And this seems to indicate that he kept animals at both homes, although it doesn't state that he slaughtered them in both locations:
Bittrolff liked to go deer hunting upstate, where he has a second home, neighbors said. Sometimes he offered them deer meat.
He also had a variety of animals in his backyard, including pigs and goats, neighbors said.
nothing was said anything about him slaughtering animals in the neighborhood.believe me a lot of people around here have all kinds of animals and they don't kill them.si I don't know why anyone would think he did that at his home.this is a very nice neighborhood and very yuppy with large homes and properties.