Wild chickens do this, yeah. They’ll insistently peck at anything red, this spray is usually for if a bird is injured to stop others or themselves pecking it and making it worse
you can also use it to help deter roosters who are getting too violent on hens, as they’ll peck and pull out feathers during the mating process
Always find it funny how the French and British traditionally hate on each other but the British will defend to the death the stupid French shit we stole for our language
the amount of times I’ve seen people get pissed off at the American English removal of the useless “u” is actually fucking silly