I have a pair of German Shepherds that do a fantastic job of patrolling my 15 acres and keeping all other dogs or coyotes away. We've never even seen a coyote track... However, we do HEAR them, all night long- they always sound VERY close and there's enough yipping and howling going on that it must be a pretty sizeable pack. For a year now, we've let the dogs have the run of the property. They're fine with the 8 horses and the 4 goats and 2 chickens. Lately, however, the dogs have become more vocal at night, and as much as I hate to admit it, we really feel that they are barking at the horses! Now that it's winter time, the horses have changed their routine, and gather together in a thick wooded area right near our house. We think the dogs believe they are "protecting us" from the horses getting too close. DH wants to lock the dogs in the hay stall at night, so we can get some sleep! He says that enough of the dogs' smell will be all over our property from the daytime that the coyotes will stay away at night. Is this true?? BTW, we are bordered on one side by a 100 acre cattle pasture (with calves), and by 14 acres with no livestock on the other. The goats and chickens are locked in the barn at night.