Submitting a fecal sample to a lab is the only way to truly diagnose a cryptosporidiosis problem in your calves.

If you notice more calves with diarrhea than you have in the past, or several calves develop diarrhea within a few days of each other, it may be time to have a sample tested for crypto. It’s also a good idea to test when calf death losses to diarrhea reach 3 percent within 21 days, says Mike Sanderson, veterinarian at Kansas State University.

Your veterinarian learned about calves and cryptosporidiosis in the January issue of our sister publication, Bovine Veterinarian. Ask him about it.