What do male dogs use in urine to mark their territory?
Natural aphrodisiacs competing for resources Tails Urine  cleaner Something coming from a gland Chemical energy an area swollen with pus Chew toys
A B C D E F G H
Pheromones are natural aphrodisiacs.
Male dogs use natural aphrodisiacs in urine to mark their territory.
What do male dogs use in urine to mark their territory? (A) Natural aphrodisiacs (B) competing for resources (C) Tails (D) Urine  cleaner (E) Something coming from a gland (F) Chemical energy (G) an area swollen with pus (H) Chew toys