Mine like wading. I got an oval 5gal water trough from tsc. Galvanized metal instead of a plastic pool so it will last in the sun. I put a large but flat rock in the bottom so it wouldn't be so deep. You can't keep them out of it once they figure out what to do. I dump and wash the mud out every couple of days, which is another reason I would avoid a pool because they would be harder to clean out. If you drop a penny in the water the copper will greatly help prevent algae which makes cleaning easier.

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