The cat is obtunded with a potassium of 8.4 and no P waves on the ECG, and you have sixty seconds to decide what to do before the rhythm deteriorates. Most emergency references describe what can go wrong — this one tells you what to do first, what it mimics, and where the window closes. The Critical Window Decision System, embedded in every chapter and consolidated in the back-of-book Master Atlas, gives you the decision anchor before the diagnosis is confirmed. • The window before cardiac arrest in FUO — why calcium gluconate precedes catheterisation and why potassium-free saline is the only acceptable fluid • The GDV sequence that kills — bilateral IV access and gastric decompression must happen simultaneously, not in sequence, and this book explains exactly why • Bromethalin versus anticoagulant rodenticide — two presentations that look similar and require treatments that are nothing alike • The fomepizole deadline — 8 to 12 hours in the dog, 3 to 4 hours in the cat, and what to do when the window has already closed • Feline anaphylaxis versus acute asthma — why the first drug differs and why getting it wrong costs the airway • Post-GDV ventricular tachycardia at 2 AM — the treatment threshold, the artefact mimic, and the lidocaine protocol • 75 Critical Window entries indexed by presenting complaint — built for shift-side use when time is the variable that matters most This book is written for emergency clinicians, criticalists, general practitioners, residents, and students managing acutely ill dogs and cats when the specialist is unavailable and the decision cannot wait. Add it to your cart and bring the level of care your most critical patients deserve to every shift.