several male dogs relentlessly follow a female dog in heat or estrus along the shoreline of a beach

mating following heat estrus pack competition surround canine cycle oestrus reproduction doggy behavior instinct aroused roaming group sexual attraction shoreline beach outside scent tracking obsess shore tide pheromone fertile seasonal breeding season receptive suitors friendly walking males one female bitch nature together friendship interaction relentless follow accompany male dogs relentlessly dog beach