Why stagnant water causes faster intoxication
That pond water was likely consumed in frantic gulps—dogs drink differently from natural sources than bowls. The organic matter in stagnant water alters its texture, often making dogs swallow more air with each gulp, which distends the stomach and triggers further drinking. This creates a vicious cycle where they can't self-regulate intake.
Your terrier's small size means the toxic effects appear sooner than in larger breeds. At 7 kg, even half a cup of water beyond her needs could begin diluting her sodium—and pond drinking often involves much more. The wobbliness suggests her brain is already reacting to cellular swelling.
The staring and wobbliness timeline
Neurological signs typically appear 30 minutes to 4 hours after excessive drinking. Your dog's vacant stare suggests mild cerebral edema—she's not processing visual stimuli normally. The wobbliness often begins in the hind legs first, progressing to front limbs if untreated.
What you're not seeing yet but should watch for: head tremors when at rest or exaggerated licking motions without food present. These often precede seizures in water intoxication cases. Time any abnormal behaviors—episodes lasting more than 10 minutes without improvement are particularly urgent.
Why home remedies make it worse
Never give electrolyte solutions or salty foods—this can cause deadly fluid shifts in the brain. Restricting all water immediately is also dangerous, as sudden dehydration stresses the kidneys. The goal is balanced medical correction, which requires IV fluids with precise sodium levels adjusted hourly based on blood tests.
Even if she seems to recover briefly, rebound swelling can occur 6-12 hours later. This is why veterinary monitoring for at least 24 hours is crucial—they'll track her urine output and adjust fluids accordingly, something impossible to do safely at home.
Preventing repeat incidents with small dogs
Terriers are especially prone to overdrinking from interesting sources. After this episode, always carry a collapsible bowl on walks to offer controlled sips. Train a 'leave it' command for water sources using positive reinforcement—practice with puddles using high-value treats as distraction.
At home, consider a no-tip bowl with measured markings to track intake. For small dogs, spreading water across 3-4 very small containers throughout the day prevents gulping. Watch for excessive drinking after exercise or meals—more than 1 cup per 5 kg body weight daily warrants a vet check.
The step-by-step response, from the first minute to the vet visit, is in our Water Intoxication (Hyponatraemia) emergency guide.