Keep a .22 rifle at the back door in coyote country.
And always watch your pets.
Even big dogs are killed by coyotes.
A mastiff stands no chance against a pack of 4 or 5. He’ll bleed out before they eat him.
I use a .223 and a backhoe.
An Irish Wolfhound eats coyotes for breakfast. Donkeys will kill them, too.