Why two nuts matter more for a beagle
A 12 kg dog eating two whole hazelnuts faces two separate issues: mechanical blockage and fat overload. The round shape and hard shell make whole nuts prone to getting stuck in the throat or intestines, especially in smaller dogs. Your beagle's weight puts her at moderate risk here—small enough to choke, but large enough that two nuts likely won't obstruct.
The higher concern is pancreatitis from the sudden fat surge. Hazelnuts contain about 60% fat, and two nuts deliver a concentrated dose to a dog that size. Watch for subtle signs like lip-licking, reluctance to lie down, or turning away from food—these often appear before vomiting does. Keep her quiet; running around increases the chance of the nuts irritating her stomach.
When to expect problems after eating nuts
Choking or gagging would happen within minutes if a nut fragment lodged in the throat. For digestive issues, symptoms usually start 4-12 hours later as the nuts move through the gut and release their oils. Late-onset vomiting (after 6 hours) suggests intestinal irritation rather than simple stomach upset.
Pancreatitis signs may take 24-48 hours to develop. Note that early vomiting doesn't rule out later pancreas trouble—the organ can become inflamed days after the fat hit. Even if she seems fine tonight, go easy on treats tomorrow to avoid compounding the fat load.
How this differs from your other dog's situation
The uneaten hazelnuts still pose a risk to your household. Dogs often return to forage more nuts once they've found some, and repeated small meals add up to dangerous fat quantities. Beagles are especially prone to this scavenging behavior.
Check under furniture and along baseboards—nuts roll surprisingly far. If either dog starts obsessively sniffing one area, investigate immediately. Consider withholding food for 3-4 hours (water is fine) to discourage further searching now that they've associated the area with treats.
What to watch for with pancreatitis risk
A hunched back or "praying position" (front down, rear up) suggests abdominal pain. Press gently behind her rib cage—if she tenses or groans, call your vet. Refusing a favorite treat is another red flag, as dogs with pancreatic pain often lose interest in food entirely.
Stool changes may take longer to appear. Greasy, yellowish diarrhea or straining to defecate can signal poor fat digestion. These signs warrant a vet visit even without vomiting, as they indicate her system is struggling to process the nuts' high fat content.
The full verdict, portion guidance and serving notes are collected on the Hazelnuts food facts page.