Most anything in the mint family will be safe ...agastaches, salvias, bee bee balms, cat mint. quite a few salvias, most agastaches and the bee balm and catmint will be perennials for you. Most all plants are poisonous to one degree or another. Any plant in the nightshade family could be a potential hazard including tomatoes and rhubarb

Penny

I have found the butterfly bush to be very nice in my backyard. It is very hardy and easy to maintain. It has several different colors to choose from, I went with the deep purple. It is supposed to be an aggressive grower, but easy when managed. I run into the same situation with dogs and poisonous hummingbird plants. I am going to try some single-flowering Hollyhock this year. As far as I know, these plants aren't poisonous. Good luck!!

Here is a link that might be useful: Dave's Garden

Okay, I'm coming up with ideas that may be a little boring, but workable. I think if I mix the salvias with different bloom times and textures I can make it look a little better and I love the butterfly bushes so that is a definite. I'll probably look for some bulbs that I can use too if I can find any that aren't poisonous.

Impatiens, small-flowered cannas, Louisisana irises, nasturtiums?

I have 5 dogs and tons of poisonous plants. Never had a dog eat any of them. And I have a ridgeback that eats EVERYTHING!
Plant for the hummers, spray the dogs when they go near the new plantings & they'll stay away from them-the water hose works good and so do those little things the kids buy-you throw them & they pop-great dog deterrant!
The hummers are going through now.
Tally HO!