On Texas-Mexico border, 'tick riders' fight a little big disease
from Los Angeles Times
The two cowboys knew the Red Angus calf could be trouble as soon as they spied it cowering behind a green patch of mesquite near a bluff north of the Rio Grande. The land has been closed to cattle for years, and the calf might have crossed in from Mexico where ticks carry a parasite that can kill up to 90 percent of a herd north of the border. It was up to the cowboys, federal inspectors known as "tick riders," to capture the calf and figure out where it came from.
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