Division 1.4.7 Mating procedure United Kingdom Original text. Later amendments are not shown. 1.4.7.1Parental (P) mating 1.4.7.2F1 mating 1.4.7.3Second mating 1.4.7.4Litter size ← Division 1.4.6 Division 1.4.7 Division 1.4.7.1 →