Male dogs use pheromones in urine to mark their territory.
Pheromones are hormones that are thought to stimulate, through smell, sexual reactions in animals.
Male dogs use smell to mark their territory.
What do male dogs use to mark their territory?
1) smell
2) H 2 O
3) love
4) intuition
5) gourdin
6) tongue
7) sight
8) fur