The use of clinical signs to detect outbreaks of HPAI in poultry flocks can act as a sensitive and effective early warning system for disease detection (Elbers et al., 2005). A significant proportion of traders are capable of detecting clinical signs in poultry given its highly virulent nature (Muktasam et al., 2009). However other endemic diseases in Bali such as Newcastle Disease can present similarly to H5N1 and the model does not account for these ‘false positive’ cases. It is assumed that the more infected birds present in a consignment the more likely it is that a collector will detect atleast one clinically infected bird.It could be argued thatthe more birds in a consignmentthe harder itis to see the clinical cases. However, the model assumes that inspection at the market is carried out systematically by inspectors such that each bird will be inspected. The outcome of rejecting a consignment of infected poultry was not considered further in the model. Presumably, collectors will want to sell these consignments elsewhere in the chain so that disease spread is re-directed elsewhere. However, a LBM could promote its higher biosecurity status to customers and traders expect a premium for their product. This ‘incentive’ could encourage collectors to trade in healthy poultry.