Why didn’t Greek farms have large herds

They had small plots of land and it was generlly poor soil. On an unirrigated few acres, a family had to grow enough grain for bread, fruit trees, olive trees for oil, vegetables and run goats and poultry. As well it had to feed an ox to plough with.And of course, it was impossible to contain all the humans – small plots could not be split up amongst several children, so surplus people had to be packed of to form new colonies around the Mediterranean and Black sea littorals. So there wasn’t space for extra humans much less herds of animals.