Dressed up pets and more in this week's best Halloween-themed animal pictures

This Terrier puppy wears a pirate costume during 'A Petrifiying Trail Pet' costume party at a Pasay city mall in the Philippines on Oct. 23.

Why can't it be Halloween all year long?

A pet owner wears a Halloween mask with her Persian cats as they take part in 'A Petrifiying Trail Pet' costume party in the Philippines on Oct. 23.

A man shows his Pincher pup wearing a bat costume as they take part in 'A Petrifiying Trail Pet' costume party in the Philippines on Oct. 23.

A ruffed lemur plays with a jack-o'-lantern carved from a pumpkin at the Zoom Torino zoo and amusement park in Cumiana, Italy, on Oct. 28.

Hippos are fed whole pumpkins during a preview for the Woodland Park Zoos Pumpkin Bash in Seattle, Washington, on Oct. 27.

Otters play with a jack-o'-lantern carved from a pumpkin at the Zoom Torino zoo and amusement park in Cumiana, Italy, on Oct. 28.

A barn owl stands on a jack-o'-lantern carved from a pumpkin at the Zoom Torino zoo and amusement park in Cumiana, Italy, on Oct. 28.

Goshi the black Jaguar stands on top of a carved Halloween pumpkin in its enclosure as part of the Enchantment event at Chester Zoo in Chester, Britain, on Oct. 24.

Meerkats search for food inside a carved Halloween pumpkin in their enclosure as part of the Enchantment event at Chester Zoo in Chester, Britain, on Oct. 24.