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.
Dogs do sense moods, they can tell the obvious ones, like playful, angry, etc. or others like when they should comfort you. My grandparents have a dog that is a bad dog when they are around, but if its just me and my mom, she is a nice dog and listens. you get my idea I'm sure. Dogs have emotions.