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.
Though dogs have emotions and get happy or sad enough TO cry, it doesn't manifest in tears the way it does with us. I remember when Jack had some surgery when he was about a year old, we picked him up and his eyes were watering quite a bit.They had never done that before and he was SO happy and relieved to see us.hough dogs have emotions and get happy or sad enough TO cry, it doesn't manifest in tears the way it does with us. I remember when Jack had some surgery when he was about a year old, we picked him up and his eyes were watering quite a bit. They had never done that before and he was SO happy and relieved to see us.