Always be aware of the wildlife around you. Yes, the deer, elk, sheep, goats and cougars wander right into town, but they are still wild animals, especially in rutting season, or when they have babies with them.
As well, when you are off hiking in the trees, keep your dogs on leashes, even when you are alone - cougars like easy pickin's, and a dog is just that!
You will probably encounter a bear while visiting this National Park. We saw two in only two days!
Never leave your vehicle or approach the bear in order to get a better photo. They may look cute and cuddly, but they can be very dangerous. Invest in a zoom lens if you must have that perfect shot.
When hiking it is recommended to make alot of noise, either by talking, whistling or just stomping along noisily. If the bear hears you coming, he will not be startled and will avoid an encounter with you.
There is a healthy grizzly and black bear population in Waterton Lakes National Park. Travelling in a group is recommended. Bear mace (last resort defence) and bear-bells (for noise) are available from some shops. I've also heard of bear-bangers, which might be compared to a military "thunderclap", a noise-maker which can shake the whole valley to scare a nearby bear away. The local joke is: just be sure it doesn't go off behind the bear...or it'll run right at you!
As a visitor to Waterton National Park, take the time to learn about the wildlife and respect their need for space to live undisturbed. Enjoy viewing them from a distance because getting too close can have dire consequences in addition to affecting their feeding habits and travel routes. A good rule of thumb is to keep at least 100 ft. (or 30 meters) away from big animals (make that three times the distance for bears). Enjoy the beauty of the wildlife from your car, don't create "animal jams." Never feed, entice or closely approach park wildlife. And finally, if you bring pets with you, keep them on a leash at all times.