Dog hair goes through a much longer anagen phase, while dog fur sheds more often and goes through the entire process quicker. (petsmagazine.com.sg)
Hair wears out, so new hairs in anagen must be produced. (2ndchance.info)
«The occipital hair samples of patients with diffuse alopecia and the frontal hair counts of those with androgenetic alopecia also showed an increase of anagen hair, but differences were not significant.» (westonaprice.org)