Where can a 12 year old find a summer job in Calgary Alberta?

during the summer my friends are usually on vacation or at camp and when my parents have to work I'm stuck with my three older siblings and I have nothing to do in summer so that's why I want to work at an animal shelter even though I'm only 12 gonna be 13 in the summer I would love to work with dogs or cats. Dogs always put a smile on my face :) so please tell me anything about animal shelters.