Have a bake sale including homemade doggy bisquits and sell them in cute packaging.

I was going to say have a car wash...but then I remembered you are in a cold place. Burr!

My stepmom's sorority had a dinner. They got permission to use the local school cafeteria and they did spaghetti, bread and salad. It was very successful.

Have a dog walk, dog fashion show, a mutt show or some sort of animal event. Not only will it draw in money, but it'll draw in a crowd of animal lovers that may be interested in donating even more.