Dogs usually gain weight for the same reasons people do--too much food and too little exercise. Some medications intensify a dog's appetite while slowing its metabolism. Rapid weight gain with no apparent explanation could point to something more serious.
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Misconceptions
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Rapid weight gain in a dog isn't always easy to see. The best way to keep track of your dog's weight is through routine inspection.
Identification
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Run your hand along your dog's ribs. You should be able to feel them without pressing. Your dog is overweight if you can't feel its ribs without applying pressure.
Benefits
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Routine inspection will familiarize you with your dog's body. Consistency will help you keep your dog's weight consistent and alert you to rapid changes.
Identification
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Gradual weight gain in spite of diet and exercise might indicate thyroid trouble. The thyroid gland regulates metabolism. Thyroid trouble can only be diagnosed and treated by a veterinarian.
Rapid Beer Belly
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See a vet immediately if rapid weight gain seems isolated to your dog's abdomen. A suddenly heavy or swollen abdomen indicates a serious disorder such as liver disease or a ruptured bladder.
Better Safe Than Sorry
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Talk to your vet if you feel uneasy about your dog's weight no matter what the circumstances. If your dog's condition isn't serious, ask your vet for suggestions on how to keep it from becoming so.
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