Bacterial diseases

Pasteurellosis

Staphylococcus sp. infection

Bordetella sp.

Pseudomonas sp.

Chlamydiosis

Mycoplasma sp.

Presence of abscesses in the lungs

Bacterial pneumonia

 Fungal diseases

Mycobacterium sp.

Aspergillus sp.

Parasitic causes

Filariasis

Reed SD, Shaw S, Evans DE. Spinal lymphoma and pulmonary filariasis in a pet domestic rabbit (Oryctolagus cuniculus domesticus). J Vet Diagn Invest. 2009 Mar;21(2):253-6.

 Metabolic diseases

Hypothyroidism

Metabolic alkalosis (Alkalosis of the lungs may be caused by too much air coming into the lungs (hyperventilation).

Mechanical problems

Aspiration of a foreign body, like a piece of hay

Lung injury or trauma

Extensive pulmonary hemorrhages

Tumors or vascular abnormalities involving the brain stem

Environment causes

Environmental stress, e.g. barking dogs, street works

Emotional stress, e.g. projection of disease

Central nervous system diseases

Neuromuscular disease

Disorders of the peripheral nervous system

Neoplastic diseases

Abdominal mass (e.g. thymoma)

Lung metastasis

Presence of a tumor in the trachea

Cardiac diseases

Presence of a pulmonary edema

Chronic cardiovascular diseases

Congestive heart failure

Autoimmune or chemically induced

Allergy

Ammonia vapors

Anaphylaxis

Toxins

Overdosage of a sedative or anesthetic drug