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.
When a dog chews on the wrong things or digs in the wrong place but does not have any other symptoms, this is considered a primary destructive behavior. Dogs that have other symptoms like anxiety, fear, or aggression in combination with their destructive behavior are diagnosed with secondary destructive behavior.Both types of destructive behavior can lead to problems with other organs, such as teeth, skin, the stomach, or intestines, if left untreated.ave to mypetMD. ADVERTISEMENT. It is normal for dogs to chew on things, dig, and be protective over their territory. Dogs are diagnosed with destructive tendencies when they destroy things we donât want them to, such as furniture, shoes, doors, or carpets. Not all destructive behavior is the same, however.