Medicine Purchase
Records medicine bought from a supplier for a batch.Recording a medicine purchase.
Line items: Product (a medicine), Unit, Quantity, Rate, Amount.
The purchase adds to the batch’s medicine stock and records the medicine cost.
Medicine Transfer
Moves medicine between batches, or issues it from the godown.Recording a medicine transfer.
Line items: Product, Unit, Quantity — no rate (a stock movement, not a purchase).
Purchase vs administer
A Medicine Purchase/Transfer changes stock. Actually giving medicine or a vaccine to the birds is recorded as a Medication under Daily Activity. Keeping them separate lets you track both what you bought and what you used.

