Why a drop is dangerous at 5 kg
Your puppy's tongue surface area relative to his body weight makes that drop spread farther than you'd think. A Chihuahua-size pup's tongue can hold about 1/4 teaspoon of liquid—oven cleaner coats every millimeter. His developing tissues are also more permeable than an adult's, letting toxins absorb faster into his bloodstream through burned areas.
Puppies lack the body mass to dilute toxins. What might give a 30 kg dog mild mouth irritation could ulcerate your pup's entire tongue. Watch for sudden behavioral shifts—puppies in pain often go from playful to silent, or may hide when they'd normally seek comfort. This quietness is more concerning than whining.
The rinsing technique that matters most
Use a turkey baster or syringe (no needle) to direct lukewarm water across his tongue sideways—never straight back, which could push cleaner toward his throat. Rinse for exactly three minutes: research shows this duration optimally dilutes alkali without waterlogging tissues. Let him shake out excess water naturally—don't wipe his mouth, as friction worsens burns.
Offer tiny ice cubes after rinsing. The cold numbs pain slightly and encourages swallowing without forcing liquids that might choke him. If he refuses all food and water after 30 minutes, dehydration becomes a real risk for such a small body—this alone warrants an ER trip.
Why puppy vomiting is especially dangerous
A young dog's esophagus is as delicate as wet paper. When oven cleaner comes back up, it burns all over again—this time with stomach acid mixed in. Induced vomiting could perforate his throat, creating life-threatening leaks into his chest cavity. Even natural gagging needs vet attention to prevent aspiration pneumonia.
Watch his belly movements. Puppies with throat pain often develop "silent reflux"—stomach acid creeping up without obvious vomiting. You might notice him licking his lips repeatedly or hear small gulping noises. These subtle signs mean alkali damage is affecting his upper digestive tract already.
The critical 12-hour observation window
Alkali can burn holes in stomach lining hours after ingestion. Your pup might seem better post-rinse, then suddenly collapse from internal bleeding or sepsis. Any dark red or black stool in the next day indicates gastrointestinal erosion—a dire emergency for a 5 kg animal losing blood volume fast.
Vets will likely hospitalize him for IV fluids and stomach protectants, not because the drop itself is always fatal, but because puppies crash unpredictably. His small veins make at-home sub-q fluids risky without training—better to let professionals manage his fragile balance.
The step-by-step response, from the first minute to the vet visit, is in our Oven Cleaner Poisoning in Dogs and Cats emergency guide.