Why sensitive stomachs amplify the risk
Your dog's history means his gut lining is already prone to inflammation—fertiliser salts like potassium or ammonium nitrate will exploit that weakness. Even a lick deposits concentrated irritants directly on vulnerable stomach folds where absorption is swift. Expect diarrhoea sooner (within 2 hours) and more explosively than in hardy dogs.
The pellets' dryness is deceptive—they rehydrate in the stomach, releasing toxins in a sudden burst. Dogs with sensitive systems lack the mucus barrier to buffer this assault. Watch for jelly-like mucus in the stool, a sign the large intestine is sacrificing protective layers to flush out irritants.
The paw-licking complication
Dogs with tender stomachs often obsessively lick paws after nausea begins, creating a cycle—fertiliser residues on pads get re-ingested, worsening diarrhoea. Use a damp microfiber cloth (not baby wipes) to scrub between toe pads where granules hide. Check the roof of his mouth too—pellets sometimes stick there, leaching toxins continuously.
Unlike single-vomit incidents from dietary indiscretion, fertiliser-induced diarrhoea often comes in waves as new gut sections react. Your 10 kg dog's smaller body size means fluid loss hits critical levels faster—weigh him daily; losing over 5% body weight (0.5 kg) demands fluids.
Bland diet timing matters
With normal upset stomachs, you'd start rice/chicken after 12 hours—here, wait until diarrhoea pauses for at least 4 hours. Fertiliser toxins bind poorly to fiber, so early feeding may accelerate their transit past protective gut bacteria. Offer ice cubes first to test tolerance without overloading the intestines.
Skip pumpkin or probiotics initially—some fertiliser chemicals interact badly with fermentable fiber. Instead, try slippery elm bark powder (a pinch mixed with water) to coat irritated bowel surfaces. Your dog's sensitivity means standard anti-diarrhoea meds could backfire—never use them without vet approval post-chemical exposure.
When diarrhoea masks bigger threats
Frequent liquid stools can distract from subtler signs like rapid pulse or pale gums—check these between clean-ups. Some lawn fertilisers contain zinc or heavy metals that don't cause diarrhoea themselves but lurk behind it, damaging organs silently.
Note the stool color—blue-green hints at copper toxicity, while black suggests upper GI bleeding from corrosive irritation. Your dog's weight puts him at the cusp where some vets might hospitalise for observation rather than risk at-home monitoring. Sensitive stomachs heal slower, making complications like colitis more likely post-exposure.
The step-by-step response, from the first minute to the vet visit, is in our Fertilisers & Plant Food emergency guide.