On the other hand, there was no clear tendency for behavioural intention to differ among herds of different sizes with the same type of herd health programme.
The variation in reproductive performance among the organic herds is larger than among the conventional ones, suggesting options for improvement in the former type of herds.
The type of herd health programme and the attitude of the farmer described most of the variation in intention between the ModuleVet and Module2 farmers.
The factors influencing significantly on the reduction of the faecal egg count after a single anthelmintic treatment were the type of herd, the age of the horse, the drug used, and the anthelmintic-resistance-status of the herd.
With the increasing evidence of herd protection in unvaccinated or otherwise unprotected children below 5 years of age, we also focused on the CoRoVa-model scenario that included that type of herd protection [ 8, 12, 17- 19].
Therefore fixed scenarios reflecting an average rate of contacts in each type of herd versus an adaptation of contacts (as would be advised for risk reduction) were used instead.
All equations are detailed in Table 4.> Two separate versions of the model were created for each disease in each type of herd, based on the two different scenarios.
Unregistered cow-calf operations (86%; 275/319) were the most frequent type of herd served by veterinarians followed by registered commercial cow-calf (70%), registered seedstock (59%), and unregistered seedstock operations (34%).
The final multivariable model (1) was identified: (1) y i = α + B i + C i + D i + E i where yi is the high intention of the ith item, α is the intercept, B is the type of herd health programme (Module2 or ModuleVet), C is the direct attitude (low, medium, high) and D is age (continuous).
The objective of this study was to investigate whether dairy farmers' behavioural intentions, i.e. to call a veterinarian or start medical treatment on the day that they detect a cow with mild clinical mastitis (MCM), are different depending on the type of herd health programme.
