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 can readily suffer from common illnesses and this may cause them to faint. If your dog collapses, you should take him to the nearest vet immediately. The longer you delay the visit, the worse will be the repercussions. Lastly, another reason which may lead the dog to collapse is simply because of the loss of stability or balance. In this regard, the dog can easily lose gait and fall over. This loss of balance may be related to certain infections of the ears or the worse if it relates to a more serious problem which includes the disruption of the control center for balance, which is located in the brain.