Best Answer: The pupil size limits the the amount of light that enters the eye. There are also day-time photoreceptors, the cones, which occur with three kinds of photo-sensitive pigments, for red, yellow-green, and blue.
Those âdevotedâ dogs lying on their mastersâ graves? Theyâre depressed. âMany dogs are simply depressed for their whole lives because theyâre deprived of the normal amount of attention, exercise, and stimulation they need from day one. These humans wonât know they have a problem and wonât want the dog any livelier as that wouldnât fit in with their lifestyle,â says Tamara.
It is more likely the cause of behavior changes in your dog that you have noticed around your time of the month, is because your dog can sense your mood change. Dogs are very perceptive when it comes to their owners moods. Your dog can sense when you are not feeling well, resulting in a change in his/her behavior.