Your dog just threw up. Or they're breathing weird. Or they won't eat for the second day in a row.

It's 2 AM and your vet doesn't open until 8. You're sitting on the floor next to them, phone in hand, trying to figure out if this is normal or if you need to drive to the emergency clinic right now.

Every dog cancer parent hits this moment. Here are the three questions that come up every single time:

"Is this a side effect of treatment, or something worse?"

Post-chemo nausea, mild lethargy, and soft stool are common and usually manageable at home. But sudden collapse, uncontrolled bleeding, or a fever over 104°F — those need emergency care. The tricky part is everything in between.

"How do I know when to call the vet vs. go to the ER?"

General rule: if your dog is still responsive, drinking small amounts of water, and able to get up — you can usually call your vet in the morning. If they can't stand, are in obvious distress, or have pale/blue gums — go now.

"Am I overreacting?"

No. You're not. You're the person who knows your dog best. Trust your gut. A vet will never fault you for calling too early.

I built a one-page cheat sheet that puts these answers side-by-side so you can scan it in 30 seconds during those 2 AM moments. Discomfort vs. emergency. Monitor vs. call vs. go.

No fluff. Just a reference guide you print out, tape to the fridge, and hope you never need — but you're glad you have when you do.