If your dog has cancer, you already know the anxiety. They're lying still. They skipped dinner. They whimpered when they shifted position. And you're standing there thinking: is this an emergency, or is this just a rough day?

After helping families navigate this exact question, here are 5 signals that separate "monitor closely" from "go now":

🔴 Go to the emergency vet if you see:

1. Uncontrolled bleeding or sudden swelling that wasn't there this morning — especially around the abdomen or near a known tumor site

2. Pale or white gums — press your dog's gum with your finger. If the color doesn't return within 2 seconds, this is circulation distress

3. Struggling to breathe — open-mouth breathing at rest, rapid shallow breaths, or visible rib movement with each breath

4. Collapse or inability to stand — not "slow to get up" but genuinely cannot support their weight

5. Seizures lasting more than 2 minutes or multiple seizures within a few hours

🟡 Monitor at home (but call your vet in the morning) if you see:

• Skipping one meal but still drinking water

• Sleeping more than usual but responsive when you call their name

• Mild limping that doesn't worsen over a few hours

• Occasional whimpering during position changes but settling afterward

The hardest part isn't the cancer itself — it's the not knowing. A clear framework turns panic into a decision.

I built a complete cheat sheet that covers all of this in a format you can print, save on your phone, and scan in 30 seconds at 2am when your dog won't settle. It's designed for the worst moments, not for reading at your desk.