Most of the howling is a group of coyotes making sounds for nightly hunting escapades and also will get other groups to howl as well, some of these you may hear and some you won't. Durring the fall/winter the coyotes won't generally make much of a fuss with a dog that has some size to it and make up of the hunting group.Many are young of the year coyotes and simply yet won't engauge anything there size unless brought into it by a dominate pair.
Spring/summer a different issue coyote pairs are on dens and defend these areas very hard, that is when I would worry about fido having free roam or a pair comming in to take on fido.
They have different vocals and group howling or hunting whines are not an agressive communication, challange howls and pairs with alot of barking and choppy howls mean business. Best thing is they tipped you off to there day layup areas and you should be out there calling them in!!!!
