A 10 kg dog versus a whole raw steak
That halibut steak was likely 200-300g—about 3% of your Beagle's body weight in one rich meal. While not toxic, this volume overwhelms his digestive capacity. Expect his stomach to either reject the excess via vomiting or rush it through as diarrhea. The raw state adds bacterial risks, but the immediate issue is mechanical overload.
His small intestine will struggle to emulsify all that fish oil without bile salts. You might see orange-tinged vomit or greasy yellow stool later—this is undigested fat, not necessarily infection. More concerning would be black tarry stool, indicating stomach lining irritation from stretching.
The next 6 hours are critical for bloat signs
Deep-chested breeds like Beagles can develop GDV (stomach twisting) after large meals. Restrict exercise but keep him awake—no post-meal napping yet. Feel his left flank behind the ribs; firm swelling there means the stomach is distending abnormally.
Excessive drooling paired with unproductive retching (no vomit produced) is a red flag. Time these episodes—if they recur every 5-10 minutes for an hour, his stomach may be trapped. Normal digestion sounds like occasional gurgles; constant high-pitched squeaks suggest intestinal cramping.
Raw fish bacteria versus fat intolerance
Pathogens like listeria cause fever (over 39°C rectal temp), while fat overload causes lukewarm ears and lethargy. Don't feed bland diet yet—fasting for 12 hours gives his pancreas a break. Ice cubes are safer than water bowls if he's vomiting; lick them slowly to prevent dehydration.
Monitor his gums—sticky saliva and tacky gums signal dehydration before skin tenting does. If he passes one normal stool followed by liquid, that's his body prioritizing water absorption—a good sign. Mucus strands in diarrhea indicate large intestine inflammation, usually self-limiting.
When the size of the meal changes the risk level
Small dogs lack reserve capacity for massive protein loads. Even if he keeps everything down, expect looser stool for 48 hours as his system processes the unusual meal. Weigh him daily—a 5% weight loss (500g for him) means he's not absorbing nutrients properly.
Contact your vet if his abdomen feels tense like a drum or if he adopts a 'praying position' (front down, rear up) repeatedly. These suggest pancreatitis, which requires medical intervention. Save a refrigerated sample of his first post-incident stool for possible analysis.
The full verdict, portion guidance and serving notes are collected on the Halibut food facts page.