We would like to inform you about the importance of a female in heat during a collection. When a female in heat is present during a collection, the collection is significantly easier than without her. This is a great advantage for the male, also we see in almost all cases a better concentration and better quality of the semen. After freezing, this has the advantage that there is a greater chance of multiple breeding units. You to always bring with you a female in heat for the collection of the semen of your dog.