Petco carries pet Halloween costumes, themed toys, seasonal treats, collars and bandanas, pet beds, food bowls, habitat decor and safety gear. Products are available for dogs, cats, small pets like guinea pigs and rabbits, and reptiles, in sizes from extra small to extra large.

Shop in late September or early October for the best selection, since popular costumes and sizes sell out as Halloween approaches. Buying early also gives your pet time to get used to wearing a costume before the night itself, which usually makes for a smoother experience.

Many pet parents do bring their dog along for trick or treating. Keep your dog leashed, use a reflective collar or light up accessory for visibility after dark, and keep all candy well out of reach, since chocolate and xylitol are toxic to dogs. Head home if your dog seems overwhelmed.