Dogs are vomiting and have no energy and appetite. Why are dogs vomiting?

Jul 26,2025
4Min


Dogs are vomiting and lack energy or are motion sick


In addition to people, dogs can also get motion sickness. When riding in a car for a long time, some dogs will suffer from motion sickness. The symptoms of motion sickness include unsteadiness, blurred vision, lack of energy, vomiting, etc.
Dog motion sickness is actually easier to solve. This is not a physiological protection measure. Don’t worry too much. The dog may even eat the food it has vomited up again.

Dogs vomit without energy or eat too much too quickly


It is relatively common for dogs to vomit after eating. The reasons for this kind of vomiting are: Eating too much makes it difficult for the intestines and stomach to move, so you will vomit. In addition, eating too fast causes food to accumulate in the intestines and stomach, or it gets stuck before it reaches the intestines and stomach, and vomiting may occur in order to expel the stuck food. Or if there is strenuous exercise within 1 hour after eating, because the food is not completely digested, the dog will also vomit after the strenuous exercise stops.

Dogs vomiting and lack of energy may be due to acute gastritis


Acute gastritis in dogs is due to dogs always eating too much, or eating spoiled food that is difficult to digest foreign bodies, etc. Or it may be due to long-term irritation of the gastric mucosa, anemia, achlorhydria, malnutrition, etc.
Symptoms of acute gastritis in dogs include depression, vomiting and abdominal pain, which are the main symptoms. Secondly, there will be obvious foamy mucus and gastric juice in the vomitus. The dog will have increased thirst, but will vomit after drinking water, reduce appetite or refuse to eat, or lie on its side, and will resist and scream in pain when touching the abdomen.
Acute gastritis can be gradually recovered through dietary supplements. As long as the symptoms are not serious, medication is not necessarily required. You can first stop eating for a day, feed a small amount of water several times to maintain the moisture of the mouth, and then feed rice soup with an appropriate amount of sugar and salt, or a high-sugar, low-fat, low-protein, easy-to-digest liquid food. You can gradually resume your normal diet after 3-5 days.

Dogs vomiting, lack of energy or gastric ulcers


Gastric ulcers in dogs are caused by ingestion of toxic substances or foreign bodies, long-term stress, Ulcers or damage to the inner wall of the stomach caused by food allergies, indigestible food, and accumulation in the abdomen.
Gastric ulcers in dogs can cause vomiting, vomiting blood, diarrhea, bloody stools, and abdominal pain. The vomitus is light brown or brown in color and may contain mucosal material. It is accompanied by mental depression, physical weakness, coarse hair, weight loss, etc.
Gastric ulcer needs to be treated as soon as possible, and infusion therapy may be required to replenish fluids, nutrients and electrolytes. Promethazine 2-4mg/kg body weight, once a day, intramuscular or intravenous injection. Feed 5ML of aluminum hydroxide gel orally, 3 times a day.
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