These may contribute enough stable and house flies to be an economic problem. Straw mixed with moisture, manure and urine is a very attractive breeding place for flies. Bedding should be removed from the hutches and walkways at least weekly to prevent fly breeding. Residual sprays can be applied to the inside and shady outside walls of the hutches for fly control. Poison baits can aid in the control of house flies, but baits do not control stable flies or horn flies as they feed only on blood.
Baits can be beneficial around calf hutches.
Distribute dry baits along walls, window sills or other areas where flies congregate. Keep poison baits away from feed, water and milk. Make light applications and collect dead flies and all bait periodically. Apply liquid baits to burlap bags, papers or other removable surfaces. After some time passes, organic phosphate insecticides used in liquid baits will decompose and only the sugar or syrup will be left to attract flies.