Experts say that the conditions that necessitate an emergency veterinarian visit include collapse, seizures, inability to walk, partial paralysis, and any difficulty breathing (non-stop panting, constant coughing, hyperventilation, or elevated heart rate). Gum color is often an indicator that something is wrong--especially blue gums or very pale gums. Excessive vomiting or a distended abdomen should be considered an emergency situation. Signs of any trauma or excessive bleeding should send your pet straight to the vet. Lastly, for cat owners, urinary obstruction is fatal if not treated, and generally occurs in male cats.