Salt load for a 15 kg frame
Your dog's larger size gives him more leeway with salt toxicity than smaller pets, but salted sunflower seeds still deliver a concerning dose. A handful could contain nearly a full day's sodium allowance for his weight. Watch for the classic progression: first excessive thirst and urination (within 2 hours), then stomach upset (4-6 hours), and finally neurological signs like twitching if unaddressed (8+ hours).
The shelled variety eliminates mechanical injury risks, so focus shifts to electrolyte imbalance. His kidneys will work hard to excrete the salt—you might hear him lapping water repeatedly through the night. This compensatory drinking is helpful unless vomiting starts, which traps the sodium in his system.
Fat versus salt symptoms
Sunflower seeds' high fat content causes different issues than their salt. Fat-related problems—like pancreatitis—develop more slowly (12-48 hours) and cause vomiting with yellow bile, abdominal tenderness, and a hunched posture. Salt toxicity acts faster, with vomiting that's often clear or foamy at first from stomach irritation.
Your dog's size means he may handle the fat better than the salt. Mild fat overload might just cause loose stools tomorrow, while the same handful's salt could make him restless tonight. Track which signs appear first—if he's panting and pacing before any gastrointestinal signs, salt is the priority concern.
Why timing of signs matters
First 4 hours: Salt absorption peaks here. If he's only drinking water and seems slightly hyper, monitor closely but don't panic. Hours 4-8: This is the danger window for salt—vomiting now means his body can't compensate, risking sodium spikes. After 8 hours: If he's kept water down and seems calm, the salt is likely processing out, but watch for delayed fat digestion issues.
Unlike with smaller dogs, a 15 kg dog may show subtler salt toxicity signs—perhaps just refusing dinner or being clingy. Don't dismiss these mild changes; they're his way of saying his electrolytes feel off. Take his resting respiratory rate; panting over 30 breaths/minute when fully relaxed suggests metabolic stress.
When to intervene versus wait
If he's vomiting clear fluid but still drinking eagerly, offer ice chips to pace his intake and call your vet for advice. But if vomiting prevents drinking or he seems disoriented (walking into walls, not recognizing you), this is an electrolyte emergency requiring immediate IV fluids.
For fat-related concerns, a day of bland diet and rest may suffice unless he develops projectile vomiting or can't get comfortable lying down. His larger size means obstruction is unlikely with shelled seeds, but persistent retching without producing anything could indicate an unusual reaction needing imaging.
The full verdict, portion guidance and serving notes are collected on the Sunflower seeds food facts page.