Here's what you should do:
1. Observe: Carefully note when the limping started, how severe it is, and if there are any other symptoms like swelling, pain, or changes in behavior.
2. Contact your vet: Schedule an appointment with your veterinarian as soon as possible. They are the best resource for diagnosing the cause of the limp and recommending appropriate treatment.
3. Limit activity: While waiting for the vet appointment, try to limit your dog's activity to minimize further injury.
4. Comfort: Provide your dog with a comfortable resting area and offer plenty of love and attention.
Possible causes of limping in dogs:
* Injury: Sprains, strains, fractures, or torn ligaments.
* Infection: Infections in the joints, bones, or soft tissues.
* Arthritis: Inflammation of the joints.
* Cancer: Tumors can sometimes cause limping.
* Other conditions: Nail problems, foreign objects, or parasites can also contribute to limping.
Your veterinarian will perform a physical exam, possibly x-rays or other tests to determine the underlying cause and create a personalized treatment plan.