Methods for French Dou to gain weight:

1. If the dog is sick, it will suffer from loss of appetite, listlessness, and weight loss. The dog should be taken care of in time. Go to the pet hospital for examination and treatment.
2. If the dog is infected with parasites, it will cause weight loss and lose weight. The dog must be dewormed regularly.
3. If the dog eats irregularly for a long time, it will cause indigestion and make it difficult for the dog to gain weight. It should be fed regularly and quantitatively to facilitate digestion and absorption.
4. You can increase the amount of exercise for your dog appropriately and take it out for runs more often to enhance your physical fitness and make your body strong.
5. If you feed your dog only, he will be malnourished and lose weight. You should feed your dog a variety of foods and feed him more nutritious foods.