Severe trouble breathing, open-mouth breathing, or gasping
Collapse, inability to stand, or extreme weakness
Unresponsiveness or not reacting to touch, sound, or movement
Seizures that are repeated, prolonged, or hard to recover from
Not eating or drinking for more than 24 hours, especially with rapid decline
Extreme weight loss or visible muscle wasting
Very pale, blue, gray, or yellow gums
Cold body temperature, especially ears, paws, or limbs
Persistent vomiting or diarrhea, especially with blood
Inability to urinate or defecate, or obvious straining with no output
Severe pain signs such as hiding, crying, aggression, or hunched posture
Loss of balance, confusion, or disorientation
Not grooming at all and appearing very dirty or neglected
Labored movement, dragging limbs, or inability to walk
Sudden change in behavior such as complete withdrawal or unusual agitation
Foul smell from the mouth, body, or wounds
Swollen abdomen or obvious bloating
Continuous bleeding or uncontrolled injury
If your cat is showing any of these signs, contact a veterinarian or emergency vet immediately