What a whole eel fillet does to a 10 kg stomach
That entire cooked eel represents a massive fat load for a dog your size—think of it like you eating three sticks of butter in one sitting. The rich oils can overwhelm their digestive system, leading to nausea within 4-6 hours or delayed diarrhea tomorrow. Check if the fillet was marinated in soy sauce, garlic powder, or other seasonings, as those add another layer of irritation.
Unlike small nibbles that might pass unnoticed, this volume guarantees some reaction. You'll likely see either vomiting (often yellow bile with food fragments) or unusually soft stool with a greasy sheen. The first 12 hours are when pancreatitis risk peaks, so note any stretching as if their belly hurts or sudden disinterest in treats.
Why the uneaten dog still needs attention
While your second dog avoided the main hazard, they may have licked plates or counter crumbs with residual eel fat. Wipe their muzzle with a damp cloth in case they ingested traces of seasoning. No symptoms are expected here, but watch for any unexpected lip-licking or gulping that suggests nausea from minor exposure.
This is also a good moment to check your trash can security—dogs often return to fishy smells. Use a locking bin or move it behind a cabinet door, as subsequent scavenging could lead to a repeat scenario with both pets involved next time.
The 24-hour watch for pancreatitis signals
Eel's high fat content makes pancreatitis the primary concern, which shows differently than standard tummy upset. Your dog might stand with their front legs lowered and hindquarters raised to relieve abdominal pressure, or repeatedly shift positions without settling. Panting when resting and complete refusal of even chicken are red flags.
Hydration is key—offer ice cubes if they're queasy, or mix water into their kibble if they'll eat. But don't force food; fasting for 12 hours gives their pancreas a break. Call the vet if they can't keep water down by morning or show stiffness when moving.
Handling future fish incidents between two dogs
With multiple pets, food theft is inevitable. Designate a closed 'fish zone' during meals—like a high table or separate room—since eel aromas trigger intense scavenging instincts. For accidental drops, practice the 'leave it' command with low-value items first, rewarding the dog who obeys while removing the other.
Consider keeping canned pumpkin (plain, not pie mix) on hand. A teaspoon mixed into the exposed dog's next meal can help bind mild diarrhea, while the unaffected dog gets their usual portion to avoid jealousy-driven counter surfing later.
The full verdict, portion guidance and serving notes are collected on the Eel food facts page.