Why two seeds barely register for an 8-kg Labrador
A dog this size would need to eat roughly thirty raw pumpkin seeds in one sitting before the fiber content might cause loose stool. Two seeds represent less than a calorie's worth of food—more like catching crumbs from your snack bowl than consuming an actual portion. The Labrador's digestive tract will process these with no noticeable effect.
Raw seeds pose even less risk than roasted ones because they lack the concentrated oils that sometimes trigger pancreatitis in prone breeds. Unless these were moldy (which you'd notice by their musty smell), there's zero toxicological concern for the bigger dog in this scenario.
The weight difference that changes everything
Your 3-kg Chihuahua could theoretically handle half a seed without issues, but her smaller gut means mistakes show up faster. Thankfully, since she didn't consume any, we're discussing hypotheticals rather than active problems. A dog this size would display discomfort from seed hulls before the actual seed contents caused trouble.
Monitor both dogs equally for the next six hours not because of toxicity risks, but to confirm neither tried to scavenge more when you weren't looking. Small dogs often succeed in stealing food moments after being "caught"—check under furniture for hidden seed stashes.
When seed size becomes relevant
Pumpkin seeds vary dramatically; some are as small as sesame seeds while others approach almond dimensions. The two your Lab ate were probably medium-sized, but if they were particularly large "jumbo" seeds, recalculate as 1.5 normal portions. Even then, we're still well within safety limits for a dog his size.
Whole seeds often pass visibly in stool, so don't be alarmed by speckled poops tomorrow. What you don't want to see are half-digested seeds reappearing in vomit—this suggests esophageal irritation from swallowing them too quickly, unrelated to the seeds' actual safety profile.
The real danger you've already avoided
This situation could have been scary if the seeds were coated in chocolate or xylitol—common holiday seasoning hazards. Plain raw pumpkin seeds are among the most benign human snacks a dog might steal. Your vigilance in noticing which dog ate what puts you ahead of many owners who only realize something's wrong after multiple incidents.
Going forward, consider keeping seeds in opaque containers rather than clear bags. Dogs respond more to smell than sight, but eliminating visual cues helps break the "if I see it, I eat it" cycle some food-motivated breeds display around novel textures like crunchy seeds.
The full verdict, portion guidance and serving notes are collected on the Pumpkin seeds food facts page.