Couple years ago a hunting buddy was out locally for a 2 day deer hunt and took his dog. Hiking in he seen a wolf pack on ridge across from him but they were working in other direction. He got to place he wanted to set camp on a flat spot on a small ridge, started making camp. While pounding on tent stakes with a rock he noticed something moving below them on ridge. His dog was laying down exhausted from hike in. He watched a lion sneak up the ridge all the way focused on the dog never him. Lion got to bush near his camp spot and laid down watching dog, when he moved from behind that bush my buddy ended that lions sneak attack. Dog was still laying there entire time. While skinning the cat my buddy watched a curious grizzly circling below where he worked on cat, luckily it finally got his wind and bolted. He texts me on Satellite basically: " seen wolves, grizz and had to kill lion, no deer wonder why, back saturday". So yes lions target dogs, there're numerous articles talking about in some areas lions survive on coyotes and recently about a yellowstone wolf so why not our bird dogs. Keep them safe