What symptoms qualify as an emergency that I should bring my pet to the hospital for?

Always consider the following a possible pet emergency and seek immediate care: Symptoms:

Any difficulties breathing; short or shallow breaths; increased effort; gagging; choking
Weakness; inability to walk; sudden collapse
First-time seizure, seizures lasting more than 3 minutes, or multiple seizures in one day
Non-productive retching/vomiting; swollen or distended abdomen
Allergic reactions including swelling, rashes, or itching
Excessive or persistent bleeding
Inability to urinate; straining to urinate
Diabetic animals refusing food
Pregnant animals in active labor for more than one hour without delivering, or going more than 3-4 hours between deliveries
Bumping into things; becoming disoriented
Signs of pain such as whining, shaking, hiding, or dull behavior
Vomiting blood/passing blood in stools/urine
Changes in behavior, appetite, or elimination

Trauma:

Ingestion: