Why a 5 kg dog's single vomit isn't an emergency yet
A spoonful of nori is enough to irritate a small dog's stomach, especially with added seasonings, but one vomit doesn't mean crisis. Dachshunds have sensitive digestive systems, so the salt and oils likely triggered a quick purge. What matters now is whether his body continues rejecting it—watch for more gagging or lip-licking that suggests ongoing nausea.
His size makes him more vulnerable to dehydration from fluid loss than a larger dog would be. Offer ice chips first, then small sips of water every 30 minutes once he keeps them down. Skip food for 4-6 hours to let his stomach settle, then try boiled chicken and rice if he seems hungry.
The iodine factor in tiny dogs
While the salt content gets most attention, nori's concentrated iodine could subtly affect your 5 kg dog's thyroid over time if he regularly eats seaweed. One incident won't cause harm, but mention this to your vet if he has future bloodwork—they may check T4 levels.
Seasoned varieties often contain garlic or onion powder, which are more dangerous than the seaweed itself. Inspect the ingredient list: if either appears in the first five ingredients, call your vet now rather than waiting.
When home monitoring isn't enough
Small dogs can deteriorate rapidly if vomiting continues beyond 8 hours. At 5 kg, your dachshund has minimal reserves; weakness, dry gums, or sunken eyes mean he needs IV fluids immediately. Don't wait for diarrhea—by then, he's losing fluids from both ends.
Watch his resting breathing rate—normal is under 30 breaths per minute. Faster panting when not hot or excited suggests electrolyte imbalances affecting his heart. Time his next vomit: three episodes in one hour warrants an ER visit.
The 48-hour window for subtle symptoms
Even if he seems fine tomorrow, iodine toxicity can manifest as excessive thirst or restlessness days later. Keep track of his water bowl refills—drinking double his usual amount for two days straight merits a vet check.
His small body may react differently than a larger dog's would. Note any unusual behaviors: pacing, reluctance to lie down, or neck stretching could indicate abdominal pain from gastritis. These signs are easy to miss in a long-backed breed that already moves carefully.
The full verdict, portion guidance and serving notes are collected on the Seaweed food facts page.