ADORABLE PET COSTUMES...PLUS HOW TO KEEP YOUR PET SAFE ON HALLOWEEN

Lion Mane Cat Costume, $7.41 (was $14.99).

Monstrously Cute Cat Headpiece, $4.99 (was $9.99).

King Purrington Cat Costume, $5.99 (was $11.99).

Lucky Cat Costume, $7.49 (was $14.99).

House Mouse Cat Costume, $5.99 (was $11.99).

Classy Feline Bowtie Cat Collar, $3.49 (was $6.99).

Franken-Kitty Cat Headpiece, $4.99 (was $9.99).

Caticorn Cat Costume, $7.49 (was $14.99).

Darth Vader Illusion Dog Costume, $20.99 (was $34.99).

Teddy Bear Dog Costume, $10.99 (was $21.99).

Bacon for More Dog Costume, $10.99 (was $21.99).

Avengers Black Panther Dog Hoodie, $13.99 (was $19.99).

Justice League Batman Dog Bandana, $6.99 (was $9.99).

Toast of the Town Dog Costume, $10.99 (was $21.99).

Jack O. Lantern Dog Hoodie, $9.99 (was $19.99).

Lion Mane Costume for Dogs, $8.71 (was $15.99).

Sometimes it pays to procrastinate.

If you waited to buy your pet the perfect Halloween outfit, all costumes are now on sale at Petco. You can order online and have them shipped to your house or to your nearest Petco store for pickup.

The O Report sorted through hundreds of options to come up with our favorites in the slideshow above. The cat costumes are one size fits all. The dog costumes come in sizes XS-XXL.

Just remember that Halloween can be tricky for pets. The O Report does not advise anyone to put their pet in a costume unless they love to dress up. (Your pet will definitely let you know!)

Even if your pet loves to get into the Halloween spirit, the ASPCA recommends making sure their costume doesn’t limit their movement, sight or ability to breathe, bark or meow. And check the costume carefully to make sure there are no choking hazards are anything else that could lead to an injury. Festive bandanas are a great compromise.

Here are more Halloween tips from the ASPCA:

Stash the Treats: Several popular Halloween treats are toxic to pets. Chocolate in all forms — especially dark or baking chocolate — can be very dangerous for cats and dogs, and sugar-free candies containing the sugar substitute xylitol can cause serious problems in pets. If you suspect your pet has ingested something toxic, please call your veterinarian or the ASPCA Poison Control Center at (888) 426-4435 immediately.

Watch the Decorations and Keep Wires Out of Reach: While a carved jack-o-lantern certainly is festive, pets can easily knock over a lit pumpkin and start a fire. Curious kittens are especially at risk of getting burned or singed by candle flame. Popular Halloween plants such as pumpkins and decorative corn are considered relatively nontoxic, but can produce stomach discomfort in pets who nibble on them.

Keep Pets Calm and Easily Identifiable
Halloween brings a flurry of activity with visitors arriving at the door, and too many strangers can often be scary and stressful for pets. All but the most social dogs and cats should be kept in a separate room away from the front door during peak trick-or-treating hours. While opening the door for guests, be sure that your dog or cat doesn’t dart outside. And always make sure your pet it wearing proper identification. If for any reason he or she does escape, a collar with ID tags and/or a microchip can be a lifesaver for a lost pet.