Bot fly will paritisze almost anything, I've read that thedifferent species are host specific and that 30-60% of any population will be paritisized by at least one maggot
Humans have been known to get infected.
Teh females lay the eggs at the entrance to burrows and dens, and the entry path is usually oral/nasal
I had a cat several years ago that developed a lump on her belly, after a while the little fella inside gnawed himself an air hole which made a handy place to yank him out with a pair of hemostats. Cute little thing he was.