Hi liselott,
Welcome to QBCommunity!
To set your QuickBooks up for success with livestock inventory management and how to account for livestock sales and purchases, I would recommend reaching out to a QuickBooks Certified Pro-Advisor that specialises in your industry so they can give you the most tailored advice.
Here is our Find a Pro-Advisor page: https://quickbooks.intuit.com/au/find-a-proadvisor/
Bonny