There are a number of factors which have an impact on the ventilation requirements of livestock and the potential for a building to deliver these requirements.
Dairy Housing - a best practice guide has the information on how to go about doing these calculations and the data needed to help. All this info can be found in Chapter 13.
If you already have a copy of Dairy Housing - a best practice guide: a small omission has been noticed within Chapter 13 - Ventilation (page 66-67). To calculate the building height difference an additional graph is required.