As far as I know, they aren't looking to rid themselves of the coyotes (unless it turns out they were rabid), they just want to kill the ones that attacked, so it doesn't matter if the remaining are just encouraged to breed.
The mother of the girl has said that she was a naturalist and would not want to coyotes wiped out because of this. They had a coyote behaviourist on who said they won't attack a human minding it's own business. He theorized that they were yearlings just learning to hunt and that she probably panicked and in turn, freaked them out.
"I see you in the front row, bouncing up and down, you're ripped and ready for a night downtown." ~ Margarita
What's wrong with a little flirtation?
Monster Tee