This sounds like something that was known to occur back when Mark Twain was a six year old.
Have these coyotes been deliberately imported to that area?
Dallas/Fort Worth is on the edge of coyotes range when Europeans first noticed them.
“Have these coyotes been deliberately imported to that area?”
No, it’s wolves the government enviro-nuts want to reestablish everywhere. Coyotes have a lifestyle that’s ideally suited to survive in suburban areas. They’re nocturnal so people often don’t see them even if they’re living in bushes on your property. They eat trash, which is available in copious amounts. They also love to snack on cats and little dogs. People often leave food out for their pets, which feeds them well.