If you are interested on heat stress measurement, drylots, or sampling methodology you must read my paper!
Read it for free until Dec 4th. Just click here!
Too lazy? Here are the highlights:
We measured the use of heat abatement resources (shade and sprayed water), respiration rate, and panting characteristics (drooling, open mouth, and extended tongue outside the mouth) in 32 high-producing cows on 4 California drylot dairies. The accuracy of different sampling intervals for these measures was tested. Cows used shade 90% of the time when observed from 1000 to 1800 h, avoiding areas with no heat abatement resources. In addition, their respiration rates were higher when panting characteristics were present than when they were not. Overall, heat load responses are most efficiently measured when sampled every 30 min.