Halloween comes to the zoo

Oct. 29, 2013: Karis, an 8 week old lion cub, growls at a pumpkin as she explores a Halloween treat put in her enclosure by staff at Blair Drummond Safari Park near Stirling, Scotland. (AP Photo/Andrew Milligan, PA Wire)

Oct. 25, 2013: A silverback gorilla appears to be smiling as he eats a Halloween treat during an enrichment program at the Oklahoma City Zoo in Oklahoma City. (AP Photo/Sue Ogrocki)

Oct. 11, 2013: A squirrel monkey reaches into a pumpkin for a treat at the Oklahoma City Zoo in Oklahoma City. (AP Photo/Sue Ogrocki)

Oct. 29, 2013: A baboon eats a Halloween pumpkin at the Hagenbeck Zoo in Hamburg, northern Germany. (AP Photo/dpa, Christian Charisius)

Oct. 25, 2013: Two Galapagos tortoises dig into Halloween treats during an enrichment program at the Oklahoma City Zoo, in Oklahoma City. (AP Photo/Sue Ogrocki)

Oct. 29, 2013: A baboon holds a cub as it feeds from a Halloween pumpkin at the Hagenbeck Zoo in Hamburg, northern Germany. (AP Photo/dpa, Christian Charisius)

Oct. 6, 2013: Everest, a nearly 4-month-old snow leopard cub at the Brookfield Zoo received an early Halloween treat during the zoo's annual Cat Awareness Weekend in Brookfield, Ill. (AP Photo/Chicago Zoological Society, Jim Schulz)

Oct. 3, 2013: Jomo, a silverback gorilla, climbs to get to a Halloween pumpkin at the Cincinnati Zoo in Cincinnati. The gorillas were enjoying the zoo's annual Pumpkin Hunt where they fill pumpkins with treats, such as granola, raisins, sunflower seeds, peanuts, grapes, popcorn and apples. (AP Photo/Al Behrman)

Oct. 24, 2013: Baby elephant Bowie checks out a frozen Halloween candy corn treat with other Asian elephants at the Fort Worth Zoo, in Fort Worth, Texas. (AP Photo/LM Otero)