Meet Cleo and Forbi, a cat and an owl who are best friends. Brazillian biologist André Costa took in the little owl when it was still a baby. The cat and the baby owl became good friends, and the kitty watched little owl grow. "The happiness does not stop there," he said.

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Cleo and Forbi, a cat and an owl. They became best friends.

They are now.

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Photos by André Costa. Also seen on Buzzfeed.