Final models for estimating the % change in body weight from week i to i+1.

The number of weeks since transition, the animals’ mean body weight and whether the animal had been water regulated in week i-1 were considered as factors (both in single parameter models and full models including interaction terms), with only the number of weeks since transition being predictive for the winter data, and whether the animal had been on water regulation or not the previous week influencing the summer weight data.