It's The Andy Griffith Show

Rosemary waded into the pond, his nose turned downward as the silvery fish darted by. He had become more interested in his fishing companion at the previous spot he had chosen and given up fishing entirely after two tried but now it was time to try again and hope his good luck hadn’t run out. Silently he hovered over the pool, his paws deep in the muddy water and waited until a flash of scales passed by and he struck, hard and fast, hoping to catch one of the wiggling masses of scales and flesh. On his back the two headed rat giggled and whispered between themselves at their companion’s expense, not that he cared at the moment, far too preoccupied with the contest now that he was undisturbed.

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