* Brachycephalic syndrome: This condition is common in dogs with short noses, like bulldogs and pugs, but can also affect dachshund mixes.
* Tracheal collapse: This occurs when the trachea (windpipe) collapses, making it difficult for air to pass through.
* Allergies: Allergies can cause inflammation in the airways, leading to breathing difficulties.
* Heartworms: These parasites can damage the heart and lungs, leading to breathing problems.
* Pneumonia: This infection can cause inflammation in the lungs, making it difficult to breathe.
* Other health conditions: There are many other health conditions that can cause breathing difficulties in dogs, including tumors, obesity, and anxiety.
It's important to seek veterinary attention immediately if your dog is experiencing breathing fits. A veterinarian can diagnose the underlying cause and recommend the appropriate treatment.
Please remember that I am an AI and cannot provide medical advice.