Abstract

Domestic dogs (Canis familiaris) use urine to communicate among themselves, however, it is unknown whether the gonadectomy (neutering or spaying) of a dog affects this communication in anyway. Urine samples from 10 intact and 10 gonadectomised, unfamiliar dogs were presented to 12 tester dogs to sniff under controlled conditions in a pilot study. The amount of time the tester dogs spent sniffing each sample was recorded. Overall, tester dogs were recorded smelling the urine of gonadectomised individuals for a longer time. In addition to the type of urine sample, the result is likely to have been influenced by the sex and status (gonadectomised or intact) of the tester dogs. The observed increase in the length of time spent sniffing urine from gonadectomised individuals could be explained by the tester dogs experiencing more difficulty in gaining information from the urine or facing more confusion while analysing the urine compared to the intact urine they have evolved to smell.

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