Dogs and their owners gather at Waterloo Place ahead of a march to Parliament Square in a “Wooferendum” to demand a People's Vote on Brexit, in London, Sunday Oct. 7, 2018. (Photo by Tim Ireland/AP Photo)





Ducks swim on an algae covered section of the River Soar in Leicester, Britain September 27, 2018. (Photo by Darren Staples/Reuters)





A deer stag barks in the early morning light during the rutting season in Richmond Park, west London, Britain, September 26, 2018. (Photo by Toby Melville/Reuters)





A Macaroni Penguin looks over a fish themed pumpkin at the Detroit Zoo, Wednesday, October 10, 2018, in Royal Oak, Mich. Each year in October as Halloween approaches, some of the animals receive pumpkins filled with treats to eat during the zoo's annual Smashing Pumpkins event. The enrichment items are hidden through out the animals' habitats or prepared and placed in a manner to stimulate natural behaviors. (Photo by Carlos Osorio/AP Photo)





50- day- old Golden Retriever puppies are seen at the Chilean police canine training school in Santiago, on October 09, 2018. Two hundred dogs of different breeds, such as German Shepherd, Belgian Shepherd, Labrador, Golden Retriever and Swiss Shepherd, are trained at the training school located in the San Cristobal hill, a green lung in downtown Santiago. (Photo by Martin Bernetti/AFP Photo)





Zoo staff gather as a female elephant named Noor Jahan eats cake on the occassion of her 14th birthday celebration at the Zoological Garden in Karachi, Pakistan October 4, 2018. (Photo by Akhtar Soomro/Reuters)





Red foxes are seen at Kackar Mountains National Park, which conserves and develops wildlife, in Camlihemsin district of Rize, Turkey on September 28, 2018. (Photo by Ali Kemal Atik/Anadolu Agency/Getty Images)





A hedgehog is seen during a religious and blessing ceremony to honour the feast of Saint Francis of Assisi outside the San Francisco Church in Lima, Peru September 30, 2018. (Photo by Guadalupe Pardo/Reuters)





An orphaned baby elephant is seen after being bottle-fed, at the David Sheldrick Elephant Orphanage near Nairobi, Kenya October 2, 2018. (Photo by Baz Ratner/Reuters)





A Chihuahua dressed as Elizabeth Taylor in the movie Cleopatra poses with its owner during an event held ahead of World Animal Day celebrations in Quezon City, Metro Manila, Philippines on October 3, 2018. (Photo by Eloisa Lopez/Reuters)





A dog dressed in costume is seen during a religious and blessing ceremony outside the San Francisco hurch in Lima, Peru on October 4, 2018. (Photo by Guadalupe Pardo/Reuters)





The female infant of Western lowland gorilla Kumbuka is seen in Jacksonville Zoo and Gardens, Jacksonville, Florida, U.S., in these images distributed on October 3, 2018. (Photo by Jacksonville Zoo and Gardens via Reuters)





The female infant of Western lowland gorilla Kumbuka is seen in Jacksonville Zoo and Gardens, Jacksonville, Florida on October 3, 2018. (Photo by Jacksonville Zoo and Gardens via Reuters)





A Chihuahua puppy dressed like a Moulin Rouge dancer rests during an activity for World Animal Day at Eastwood Mall, Quezon City, Metro Manila, Philippines October 7, 2018. (Photo by Eloisa Lopez/Reuters)





A squirrel scampers among autumn foliage at the Botanic gardens in Dublin, Ireland October 4, 2018. (Photo by Clodagh Kilcoyne/Reuters)





A polar bear shakes off as she holds a pumpkin at the Detroit Zoo, Wednesday, October 10, 2018, in Royal Oak, Mich. (Photo by Carlos Osorio/AP Photo)





A crocodile has trapped himself inside a rubber tire and other debris left along a river's edge by a massive earthquake and tsunami that hit Palu, Central Sulawesi, Indonesia Thursday, October 4, 2018. Life is on hold for thousands living in tents and shelters in the Indonesian city hit by a powerful earthquake and tsunami, unsure when they'll be able to rebuild and spending hours each day often futilely trying to secure necessities such as fuel for generators. (Photo by Aaron Favila/AP Photo)





An Atlantic seal pup lies amongst the rocks at St Martin's Haven, Pembrokeshire, Wales, Britain October 8, 2018. Seal pups are born with fluffy white non-waterproof coats which they moult out in their fourth week. (Photo by Rebecca Naden/Reuters)