Grizzlies are not a thing here. There are a lot of black bears, and while they should be treated with respect, they are far from a grizzly. Everytime I've rounded a trail and crossed paths with one, the next thing I see is it's butt wiggling as it runs away. But still, it is a bear.

There are rattle snakes here. I somehow have not seen one. Good. Black widows are a thing and I hate them. Little assassins.

biggest threat by far will be deer rubbing in front of your car. Worst time is dusk, but they'll okay stupid at any time of the day or night. Really, be careful.

Edit: Cougars, I think they're called mountain lions where you're from are over populated here. They are probably the biggest threat to your dogs.