Unlock Pour-on lice and flystrike control $70.95 incl. GST Unlock Pour-on for Sheep is an easy to use Pour-on for up to 14 weeks lice and flystrike control. See below for dose rates. Backorder stock is due July. Please email sales@ahdltd.co.nz to request a price. Also available from Farmlands PLEASE NOTE: This product is classed as DANGEROUS GOODS and NZ Couriers cannot deliver to a rural address. If your address is rural, you will need to pick up from your local NZ Courier depot. Select options