I took my golden retriever tricker treating every year. She'd hear the word treat and think, ya! She was a princess the first couple of years. An easy costume given all our pets are princesses or princes. Maybe my two new black and white corgis and my pyrenees can go as a herd of cows.( I could throw some black felt spots on my pyrenees and we'd be good to go. My 9 year old thinks the new corgi's look like cows.)