The aim of this project is to determine the effectiveness of several communications strategies of a newly developed Swiss mastitis protocol in a randomized field trial. The results from this study will give insights in the effectiveness of a future nationwide mastitis control program in Switzerland. Both the field trial and the future mastitis control program have the aim to decrease mastitis occurrence in Switzerland by 20% within 1 year. A reduction in mastitis implies improvements in animal welfare, animal longevity, and farmers’ profita-bility and it reduces antimicrobial use in Switzerland.
Our initial hypothesis is that the combination of tailored information (ie, a farm-specific udder health protocol)
with interpersonal communication would result in stronger farmer’s motivation to improve udder health com-pared to tailored information without interpersonal communication or no intervention. Moreover, we expect improvements to be higher if dairy farmers discuss the advices among each other in study groups and if they publically commit to improve udder health in their herds (Lokhorst et al., 2010). To test this, a randomized 4-arm field trial will be organized. Udder health will be optimized in dairy herds during a 4-month optimizing phase and will be followed by a follow-up period of 1 year:
1. Farms receiving no farm-specific udder health protocol and no follow-up (control group).
2. Farms receiving farm-specific udder health protocol and interpersonal communication by their own veterinarian.
3. Farms receiving farm-specific udder health protocol and no interpersonal communication.
4. Farms receiving farm-specific udder health protocol and interpersonal communication by study groups.
Group 1 and 2 are the groups according to the TBB project. Groups 3 and 4 are added in this proposal.
This randomized controlled field trial will answer the following research questions:
1. Does a herd-specific animal health protocol improves udder health in Swiss dairy herds (group 1 vs. 2, 3 and 4)?
2. Which communication strategy of this animal health protocol is the most beneficial in improving ud-der health in Swiss dairy herds (group 2 vs. 3 vs. 4)?
3. Which communication strategy of this animal health protocol has the largest impact on farmers’ moti-vation to improve udder health in their herds (group 1 vs. 2, 3 and 4)?