T.R. Raymond says the mules are slower than a petroleum-powered tractor, but there are benefits.
"This fuel's so high, you can't afford it," he said. "We can feed these mules cheaper than we can buy fuel. That's the truth."
And Danny Raymond says he just likes using the mules around the farm.
"We've been using them quite a bit," he said.
Brother Robert Raymond added, "It's the way of the future."
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