Why would a lower feeder be more resistant to cattle and hogs? It seems like you would need a pen regardless.
Lower center of gravity. Not as easy to turn over.
Fewer operator injuries. No ladder to fall off of.
Rambal makes cradle for 55 gallon drums to sit on. I have bought a few and the results are good all around.
Here is a picture of a pen the cows tore up but the feeder is still up right and working.
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