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 sometimes whine when they feel pain. A whining dog is never a fun scenario, and the frustration of it is only heightened when you cannot figure out exactly what is bothering your poor pooch. Canine whining can be a sign of many things, from standard separation anxiety to a simple craving for your acknowledgement and attention.