11. Spaying may therefore escalate any observable aggressive behaviour , either to humans or other dogs. 12. Dogs that display dog-aggressive behaviour do not necessarily show aggressive behaviour towards humans. 13. Dogs that display dog-aggressive behaviour do not necessarily show aggressive behaviour towards humans. 14. In populations where the resources are scarcer, more aggressive behaviours are likely to evolve. 15. It displays an aggressive behaviour , baring its open blue mouth and barking if provoked. 16. A wide variety of displays are seen, with aggressive behaviours outnumbering pro-social ones. 17. The lyrics'violent representations, including murder and aggressive behaviour , have also generated controversy. 18. Therefore, once the dominance hierarchy is established, aggressive behaviour is reduced between herd members. 19. She moved to Shreveport after having been expelled from a nest in Illinois for aggressive behaviour . 20. The diet section does not provide any evidence that diet causes self harm just aggressive behaviour .
