1. Oranges and grapefruits: They are rich in vitamin C, which can replenish physical strength and help digestion. They can be eaten by dogs with constipation, but they should not eat too much.

2. Bananas: Bananas contain sucrose, which promotes the increase of beneficial bacteria in the intestines and helps intestinal peristalsis. It is especially recommended for dogs with constipation or diarrhea.

3. Watermelon: Watermelon can replenish water and relieve the heat, but if you eat it, your dog will keep running to the toilet to pee. Watermelon seeds are not digested and will appear in the stool. Be careful not to eat too much, as watermelon has a high sweetness content.

4. Apples: Apples are rich in dietary fiber, and pectin is effective in eliminating toxins from the body. Note that it contains a lot of sugar and should not be consumed in excess.

5. Avocado: Avocado contains a lot of protein, vitamin E, and lipids. The unsaturated fatty acids in lipids can help your dog’s hair and skin stay shiny and beautiful. It is highly recommended for dogs with allergies.

First aid for dogs choking on fruit:

1. If a dog chokes, it must be sent to the hospital as soon as possible to prevent the fruit from getting stuck in the trachea, delaying treatment and causing misfortune. It is recommended to implement simple first aid methods on the way to the hospital.

2. If it is a medium or large dog, the owner pinches the dog's jaw joint with the thumb and index finger of one hand, forcing the dog to open its mouth, and inserts the other hand into the dog's mouth, and uses the index finger to hold the dog's jaw joint. Digging out the foreign object in the dog's mouth.

3. If it is a puppy, the owner should pick up the dog with one hand and let the dog lie on the small arm; pat the dog's shoulder blade with the other hand. You can also use the first aid method for medium and large dogs, insert your fingers into the dog's mouth and dig out hard choking objects.