This Halloween, please remember that your pets have feelings too. No matter how social they are or how excited they are initially to participate in whatever you're doing, it's not fair to them to subject them to the discomforts of a costume and of being paraded around to meet crowds of strangers. There may be strange noises and sights that make them uncomfortable. They may tire of the activity quickly. They may feel scared, intimidated, overwhelmed, or even get angry and start a brawl with another animal. Children may intentionally try to frighten them, innocently or otherwise.
Please don't let your animal companion end up looking like this sad butterfly. Leave her at home in her cosy bed instead.