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.
Summary: Dog Stomach Problems and aches can have multiple causes including ulcers, blockages, tumors, bloat (gastric dilatation volvulus), Addison's disease and gastritis. Dogs can also exhibit vomiting and diarrhea as a reaction to a problem in the intestines, food allergy or food intolerance.