Complex sentence: Even improved breeds of animals and birds are reared in Nepal these days which is working as main source of income for Nepalese peoples.Among other animals cows are reared most because of their religious and economic values.
Split into simpler sentences: Even improved breeds of animals and birds are reared in Nepal these days which is working as main source of income for Nepalese peoples. It is belived that Gopal kings used to rear cows.Among other animals cows are reared most because of their religious and economic values.