Fig. 1

DHGLM fit estimates effects on the mean and dispersion models for Distance travelled and Time at the edge for chickens tested in open field test. Effects of treatment, sex, age and week are presented in reference to Placebo, Female, Early-age and Week 1, respectively. (Asterisks note estimate significance where * = p < 0.05, ** = p < 0.01, and *** = p < 0.001).