Effects of isolation and grouping on guinea pigs.
D000311:Adrenal Glands / Q000033:anatomy & histology; D000367:Age Factors; D000374:Aggression; D000818:Animals; D001835:Body Weight; D003441:Crowding; D005106:Exploratory Behavior; D005260:Female; D006168:Guinea Pigs / Q000254:growth & development*; D006801:Humans; D008124:Locomotion; D008297:Male; D009929:Organ Size; D012737:Sex Factors; D012726:Sexual Behavior, Animal; D012919:Social Behavior; D012934:Social Isolation; D013315:Stress, Psychological; D013737:Testis / Q000033:anatomy & histology