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I have seen your video "Science before legislation". Im rather surprized your focused on open stalls, for a solution to the welfare legislation. We in Spain have worke for close to 10 years with Electronic Sow Feeding Stations, and we have a 3300 sow school farm we would like you to vist, to understand the dinamics of large groups. we are seeing equal or better results with this system.
Please write to us, we would be happy to share our experience: firstname.lastname@example.org