https://www.greenme.it/animali/allevamenti/maiale-in-procinto-di-essere-macellato-reagisce-uccidendo-un-dipendente-di-un-mattatoio/?fbclid=IwAR3HvepGb_i0kvb7HQ12IDlGRWndDVjzIblqVcjSzv_KmGizcHkOv_UJ_pE
- https://www.corriere.it/salute/23_gennaio_17/cani-fiutano-malattie-perche-studio-25b97d20-959a-11ed-9d82-799102737236.shtml?fbclid=IwAR1tpQdVxcZ78M_vH08tPTPdbG64Mal8ztcJdm2E7pjGSpBahYg-mwlxjxo
- https://rivistanatura.com/grandi-grosse-e-immuni-dal-cancro/