A rancher is warning others about the potential spread of the screwworm.

It's a fly that right is currently in southern Mexico, but it's been moving north.

"You might have pets, you might have a horse, they are companion animals. This pest isn't a discriminator. It will infect any animal with an open wound," East Foundation Chief Science Officer Dr. Jason Sawyer said.

New legislation proposed Friday by Representative Monica De La Cruz calls on the USDA to study the problem and prepare a response.

At El Sauz Ranch in Willacy County, a lot of work has been underway to get the herd ready. They're concerned that as the screwworm continues moving through Mexico, it could affect them here in South Texas.

El Sauz is a 27,000 acre ranch that mixes commercial cattle raising with wildlife conse

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