Behavioral responses toward nociceptive laser stimulation. Effects of Escherichia coli inoculation in the left front quarter on behavioral responses toward nociceptive laser stimulation at caudal udder or hind leg of dairy cows. Induction of E. coli mastitis was done after measurements on day 0, why day 0 serves as control day. Results are presented as mean and SE from 7 cows. Plots with different letters differ significantly.