I noticed one of my Hereford steers panting today. It was around 90 degrees and humid. This is the steer that hasn't totally shed his winter coat--I'm worming them this weekend and he's been on good mineral for 2 1/2 weeks now. The other Hereford steer and the 5 black heifers were not panting and they're coats are all slick and shiny--(not hairy). Other than that he seemed fine and was walking with the others grazing (although not as much because he would pant some, eat some).