Abstract excerpt:
“In domestic dogs, mechanisms of attracting males by a female in estrus were studied … The results of Experiment 1 show that volatile semiochemicals alone produced by a female dog in estrus, without respective visual stimuli, are not sufficient to induce a full sexual response in male dogs. … Direct contact with estrous urine stimulates males for close nasal contact, accompanied by the licking of the urine. … It is concluded that the estrous urine contains semiochemically active, non-volatile compounds that need to be identified.”
