Three methods of overcoming inbreeding depression in animal husbandry are outcrossing, cross breeding and interspecific hybridization. Outcrossing is the mating between unrelated members of the same breed upto 4-6 generations which have no common ancestors on either side of their pedigree. In cross breeding the superior males and females of two different breeds are mated to obtain better progenies. The interspecific hybridization involves mating between members of two different species. This results in the formation of interspecific hybrids.