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A mad veterinarian has created three animal transmogrifying machines, each of which converts one pair of animal types to another pair.

Place four cats and three dogs in the input bin of the first machine, press the button, and … whirrr … bing! Open the output bins to find three mice and a rabbit.

The second machine can convert four cats and a mouse into three dogs and two rabbits; the third machine can convert a cat and three rabbits into a dog and a mouse. Each machine can also operate in reverse (e.g. if you've got three mice and a rabbit, you can convert them into a four cats and three dogs).

The mad veterinarian has handed you seven cats and seven dogs, and expects you to convert them into mice and rabbits, without any leftover animals. Can you do it? Can you handle the other conversion tasks he asks of you?

If you need help with the applet, press the ? button. Or follow the link below for how to solve these puzzles. The different conversion tasks can be selected from the Puzzle Choice pop-up menu.
How To Solve Mad Veterinarian Puzzles
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