We noticed that the histological changes in the crop wall was in the lining epithelia only , also we
found that the pigeon milk production in the 12 day of broodness is enough to feed the young , in which
the thickness of stratified squamous epithelium was 432 micrometer . There was an important statical
different in the weight of crop epithelium thickness in the 12-16 day of incubation in compare with 1 – 6)
day of incubation . There were no histological changes in the structure of crop glands.