I know its not funny to you, but I can't help but laugh!
My daughter's dog is half Huskie, half herder, very clever girl she would open everything but the fridge, my daughter had to change all the handles in her apt.
What kind of fridge do you have?
I bought one with the freezer on the bottom with french doors on top. The freezer door (at your dog's level) is super heavy, they could not open it. The upper french doors maybe, but the 1st 2 shelves are actually drawers that hold cheese/deli stuff and fruits/vegs. It would be hard to access the upper shelves. So, can you buy a new fridge?