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Central Texas | Not sure what size hole would keep cows out maybe 10-12'inches wide and maybe 15-18 inches tall. Probably be best to keep cage around poly tank to give added strength. Think it will be tough to keep cows out with just a small hole, especially a small cow. Probably be best to surround the tank with fence panels and one creep gate to allow calf access to tanks with fair size holes. | |
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