When delayed stomach upset happens after cod
Twelve hours is usually enough time for a dog to show any immediate reaction to eating cooked cod. Since your 10 lb dog seems fine now, the main concern would be mild digestive upset from the fish oil or small changes in diet. Some dogs take a full day to process new proteins, especially if they don't often eat fish.
Watch for subtle signs like licking lips more than usual, turning away from food, or one episode of loose stool. These would be more likely from the richness than toxicity. If you see them, skip the next meal and offer boiled chicken with rice instead of regular kibble for a day.
Why size matters with fish portions
A 10 lb dog eating a few bites of cod is very different from a larger dog eating a whole fillet. The small body weight means even safe foods can overwhelm their system if given in human-sized portions. Leftovers often contain butter or oils we don't notice – harmless to us but potentially irritating to them.
Check the original dish for garlic, onions, or heavy sauces you might have forgotten. Those would cause different symptoms than plain fish. Since your dog ate it baked, the main risks would be from added fats rather than the cod itself.
The next 24 hours with no symptoms
When a dog shows no vomiting or diarrhea after half a day, the chances of further problems drop significantly. Their stomach has likely emptied by now, so any discomfort would have appeared already. Continue normal feeding but consider breaking meals into smaller portions today to ease digestion.
Hydration is key after any new food. Check that your dog is drinking normally and passing urine at their usual frequency. A single strange stool isn't alarming, but repeated watery bowel movements or straining would warrant a vet call.
When to relax completely
After 24 hours with no symptoms, you can consider this incident resolved. Dogs process lean proteins like cod relatively quickly, and the lack of immediate reaction suggests good tolerance. The main lesson is about portion control – a few flakes would have been safer than a chunk for such a small dog.
Going forward, introduce any new protein in much smaller amounts mixed with their regular food. This gives their system time to adjust. Remember that sudden diet changes cause more issues than the actual ingredients in most cases like this.
The full verdict, portion guidance and serving notes are collected on the Cod food facts page.