Last spring we (about 10 riders) out riding in the national park here, black bears are common. We had only been riding about 10 mins. And my friend points up in a tree by the lake we were riding along......there was a cub up the tree......first thing I thought was "where's Mom?"!! We all started hollaring and making noise and the mom was ahead of us on the trail running away from us.....a ways down she cut back into the bush, she probably back tracked to her cub.......a couple of the ladies we were riding with ride there all the time and they said to make noise, talking, whatever (bells if you want) that will let any bears know we are coming and they usually head into the bush.......shortly after I was leading and we ran into a HUGE bull moose!!!
Funny but I never noticed the horses get worried when we ran into those.....we've also come across 4 coyote cubs running down the trail in front of us and zipped into the bush, foxes, tons of deer, elk....it's great to see the wildlife like that while out riding!