Some dogs hide leftover food when they are full, which shows their high intelligence. Dogs with low IQs will be dazed and overwhelmed when they see unfinished food. Dogs with high IQs will hide their food and eat it until they are hungry so that they don't go hungry.
Picky eaters are also a sign of high IQ, they know how to distinguish between good and bad food. Conversely, low-IQ dogs will eat up all their food, for better or for worse. For picky eaters, the owner cannot be indulgent, eating the same food for a long time will lead to nutritional imbalance, so it is necessary to correct this behavior and provide diversified nutrition**.
Some dogs are very vindictive, which shows how smart they are. Dogs that are not smart do not hold grudges. With this kind of dog, the owner should be careful not to take their things casually, otherwise the dog will hold a grudge.
Hungry dogs will ask their owners for food, and the action shows that they are smart and know that this is how to attract their owners' attention. The owner should correct this behavior in time to avoid the dog begging for food from strangers and avoid accidents.
Some dogs flaunt their power in front of their owners, but they will immediately bow their heads and admit their mistakes after the owners leave. This type of dog is intelligent and knows to restrain when the owner is not present.