Table 34.

Sources of uncertainty in the estimation of the relationship between NDF amount provided to the calf and percentage of time spent ruminating

Sources of uncertainty	Reason
Climate	Hot weather is expected to result in lower rumination times
Breed	Different breeds can have different rumination behaviour
Type of feed (e.g. grass, pasture, roughage, other)	Different feed types can potentially result in different rumination times. Coarse fibre is expected to result in longer rumination times.
Sex	Possible effect of sex on rumination times not determined