I dont bother with them tbh,never really have,when my wheaton x was 11 months old,I let her run a few first night on an invite...she caught 2 on the lamp down Southampton way,they both made it to cover,and she plucked them out,she been straight lined in the day up on the mountain tops by us....not known many dogs that could catch up there tbh...my mates fly their gos/harris hawks to em,I enjoy a day out watching that...but the thought of walking about coursing them ....Id rather sit there,and scratch out my own eyes