MANHATTAN, Kan. (AP) — Kelly Hammel never expected to become a worm farmer, but a work accident led him to the hobby, which has now become a small business.

In 2015, Hammel, who owns Worm Hippie Worm Farm, was pinned by a cow and got hurt while attempting to push the cow off. He had two surgeries, one of which led to complications, forcing him to be bedridden for a couple months.

"I had a lot of time on my hands so I just searched the internet for things you could do at home and I came across this," Hammel said.

He was a biology teacher until 2013, so worm farming piqued his interest, he told...