This program helps to assess whether sheep should be treated after shearing. It estimates the probability that the flock is infested with lice at shearing by separately estimating the risk that:
For some screens you can indicate in the first question that there are no relevant sheep in that category and skip further questions on that screen
Click on the Start button below to begin, then use the Next button to proceed through the stages. Should you wish to change any options chosen in previous stages then use the Back button to step backwards and modify your selections.
Regional Lice Prevalence
Time since last treatment
Long wool lice treatments
Have you seen lice in these sheep?
Any signs of rubbing
You can check rubbing with the Rubbing Tool
Lice present at last shearing?
Studies have shown that overall, any particular treatment on-farm, applied by the 'average' wool producer has a 65% chance of eradicating lice. Obviously this varies greatly between producers, with the type of treatment, and the standard of application. You can use this probability or obtain a more precise estimate applicable to your property by using the Treatment Factors Tool then entering the results here.
Number of different sources of rams in the last 12 months
Treatment before mixing with home flock
Use the three options below for stock that stay in quarantine until shearing and are then treated
Inspection for lice before mixing with home flock
Ram supplier status
Number of different sources of ewes in the last 12 months
Ewe supplier status
Number of sources of young sheep or wethers in the last 12 months
Sheep supplier status
Number of neighbours with no lice
Strays includes sheep straying to neighbours and returned as well as strays from neighbours.
Chance of strays
Fence quality (worst section, not average)
Number of neighbours with unknown lice status
Number of neighbours with lice