non-mammals do not nurse their offspring
cold_blooded_animal is non_person_animal. notoryctidae is mammal_family. sea_mammal is non_person_animal. not_all_animals is mammals. notostraca is animal. calf is young_mammal. baby is young_mammal. natalidae is mammal. nonacceptance is rejection. mammals_like_kangaroo has pouch_for_young_offspring