Red bottles are kept outside the house as a way to keep stray dogs and monkeys away and from being a nuisance.
Animals including dogs are allergic to red color and get furious.
So they avoid going there."
It is easy to think about dogs being "allergic" to red but the science behind dogs' vision is more complicated.
One of the common recurring tropes in dog jokes is their color blindness.
Most people leave bottles on their lawn to prevent the dogs, cats, and other pets from coming onto the lawn.
Plastic bottles filled with water scare these creatures and keep them away from the lawn.
While some other places lead water bottles in their lawn to water the grass for a long time
Dogs have a different color vision compared to humans.
While humans have trichromatic vision (seeing three primary colors: red, green, and blue), dogs are dichromatic (seeing two primary colors: blue and yellow).
This means that dogs cannot perceive red and may see it as a shade of gray or a different color.