How the salt and fat affect an 8kg dog right now
The immediate concern with half a cup of chips is the salt load hitting your dog’s system all at once. For a smaller dog like yours, that much sodium can trigger excessive thirst, followed by potential vomiting as the stomach rebels. The oil from frying also coats their digestive tract, which may lead to loose stool or gassiness within the next few hours.
Right now, encourage water but don’t force it—let them sip gradually to avoid bloating. Clear the area of any remaining chips to prevent a second round of snacking. Restlessness could mean mild discomfort; keep activities low-key to avoid stressing their system further.
What to expect in the next 2-4 hours
Most dogs will process this amount of chips with just some gastrointestinal grumbling. You might hear stomach noises or see your dog licking their lips more than usual—signs of nausea. Panting could increase if the salt makes them thirsty, but true distress like stumbling or confusion would signal sodium overload.
Diarrhea often appears later, sometimes after the first vomit. The fat content delays digestion, so don’t assume they’re in the clear if nothing happens within two hours. Skip their next meal to give their gut a break, but ensure water stays available.
When a vet call becomes necessary
For an 8kg dog, half a cup of chips pushes close to the risky zone for salt toxicity. Watch for repeated vomiting (more than twice in an hour), tremors, or disorientation—these would mean the sodium is affecting their nervous system. Small breeds are especially vulnerable to electrolyte imbalances.
If they refuse water but keep panting, or if their gums feel tacky instead of slick, dehydration is setting in. Dogs can’t regulate sodium like we do, so waiting overnight isn’t safe with these signs. Have your vet’s after-hours number ready.
Longer-term effects of this snack
One chip binge won’t cause lasting harm to a healthy dog, but the aftermath can linger. Some dogs develop temporary pancreatitis from high-fat foods, showing as belly pain (arching their back) or loss of appetite the next day. The salt surge may also make them urinate more for a day or two.
Use this as a chance to dog-proof your snack stash—many dogs go back for more once they’ve tasted salty treats. Consider keeping plain rice cakes or carrot sticks on hand for safer crunch cravings.
The full verdict, portion guidance and serving notes are collected on the Chips / crisps food facts page.