Perhaps you have take the word diligent out of context. My point is that any one person that calves in cold temps will be out there checking more often and be a little more careful than that same person would when it is substantially warmer. I can't for the life of me see why anyone would dispute that. When it gets -30 at night here we are out every hour, and those showing signs of calving are placed in a barn. When it is warm at night we back off to checking every 2 1/2 hours or so. We become a little less ..... ummmm.... diligent   :wink: 

And Soapweed is quite correct, hot temps stress cattle more than cold temps. It's gotta be awful cold for cattle to stop eating (somewhere around 60 below F), but it doesn't have to be very hot before they're holed up fighting flies and losing weight.

At any rate, if you're looking at removing potential public relations fiascoes perhaps hot brands and any form of castration that isn't done by the vet should top the list. A good close up photo of a calf with it's eyes bulged out, mouth open bawling, smoke rolling off it would make a pretty good tool for the PETA movement.