Proportions of time spent in stress-related and resting behaviours, before and during exposure to the DAP collars, for each dog in the study. Proportions of time spent in stress-related and resting behaviours, before and during exposure to the DAP collars, for each dog in the study. Differences in proportion of time spent in each behaviour (baseline versus treatment period) are shown above the data columns. E. K. Grigg, and M. Piehler Vet Rec Open 2015;2:e000098 ©2015 by British Veterinary Association