To be honest, if you comparing a coyote to a fox, your sadly sadly mistaken.
Coyotes are EXTREMELY tough animals, and can be very agressive. Add to that there fast as all hell, and sneaky as shit...
I think its pretty impressive.
Where i live ive seen up to a pack of 5coyotes hunting with eachother, and ive also seen them lure my own dog into a ambush in the thicket where there is more than one waiting for them. Usually they have a strong fear of human, but not much fear of dogs..at least single dogs.