From Google wiki, in accord with your friend's report:
Although coyotes live in family groups, they usually travel and hunt alone or in loose pairs. In this way they are different from wolves, which sometimes leads to the impression that coyotes do not form packs since they are usually seen alone.
Wolves, now, there you have another--and murderous--cup of tea.
“Although coyotes live in family groups, they usually travel and hunt alone or in loose pairs. In this way they are different from wolves, which sometimes leads to the impression that coyotes do not form packs since they are usually seen alone.”
I don’t claim to be an expert. I gave up hunting about 12 years ago when I took a job transfer and it just wasn’t possible to “get off work” to do so.
But around the time I gave it up, the eastern coyotes were appearing in the capital region of Pennsylvania. One of the theories is that so-called western coyotes (a naturally smaller animal) have cross-bred with wild dogs or wolves resulting in a larger animal that fills a different biological niche. A niche that might include taking larger animals like young deer. Sounds reasonable.