When dogs eat, they often push the bottom of the bowl with their noses to keep the bottom of the bowl close to the ground. There may be several reasons for this behavior: Stabilizing the position of the bowl: When the dog licks food or drinks hard, the bowl may be overturned. If the bottom of the bowl can be close to the ground, it can be kept in place more stably. Avoid spilling food or water. Convenient licking: When a dog licks food or drinks water, it needs to put its tongue into the bowl. If the bottom of the bowl is too far from the ground, the dog will need to raise its head, which will require more effort. By lowering the bottom of the bowl, the dog can more easily lick the food or water in the bowl. Health reasons: Dogs may inhale air when licking food or drinking water. If the bottom of the bowl is too high from the ground and the dog needs to raise its head to lick food, it will easily inhale more air, causing problems such as abdominal distension.
Putting the bottom of the bowl close to the ground can reduce the amount of air inhaled and protect the dog's health. To sum up, the dog's behavior of cleaning the bowl to the bottom may be for the purpose of stabilizing the position of the bowl, making it easier to lick food, and protecting health.