"To get to the Glière mountain pasture, you have to cross the stream and an ""invisible barrier"". Effectively, a bridge with a “Canadian passage” prevents the herds from crossing. This consists of cylindrical bars spaced apart and arranged horizontally on the ground. The ungulates (cows, sheep) are unable to cross this barrier. They would risk wedging their hooves in between the bars.The Favre family once worked the Glière mountain pasture and produced ""tomme"" before the appellation ""Beaufort"" appeared. Today, this pasture has been taken over by a young farmer who grazes sheep and produces sheep cheese."