How commercial products differ from bait stations
Rodenticide in a dog treat is especially alarming because the formulation is designed to be palatable — your terrier likely ate more of it willingly than they would from a bitter bait block. The concentration per gram may be higher too, since manufacturers assume rodents will nibble small amounts over days.
Unlike accidental bait ingestion where dogs often spit out part of the block, your dog consumed half of what smelled like a legitimate snack. This means near-total absorption of the toxin, with nothing left to estimate exposure by. The chew's soft texture also speeds absorption compared to hard bait.
Why 12 kg body weight changes the equation
Smaller dogs like your terrier reach toxic thresholds faster than large breeds. The same half-chew that might cause mild clotting delays in a 30 kg Labrador could trigger life-threatening hemorrhage in your 12 kg dog. Their smaller blood volume means proportionally greater impact from any bleeding that starts.
Terriers also tend to be active, which raises blood pressure and can worsen any internal bleeding once it begins. A calm dog might ooze blood slowly from capillaries, but a terrier's high-energy movements could turn small bleeds into rapid blood loss.
The deceptive timeline of symptoms
Initial blood clotting tests at the vet may appear normal for 24-48 hours because existing clotting factors haven't fully depleted yet. This false reassurance often leads owners to delay treatment, only to return days later with a dog collapsing from internal bleeding.
Watch for subtle early signs: slightly increased respiratory rate, taking an extra second to stand up, or licking lips more than usual (possibly from nausea caused by internal bleeding). These precede the classic pale gums and weakness that indicate advanced blood loss.
Contamination risks beyond the chew itself
Check your dog's paws and face — rodenticide dust from handling the treats could be licked off later, adding to the dose. Also inspect where they ate it: crumbs on carpet or bedding become secondary exposures if ingested over subsequent hours.
If other pets share the home, restrict their access to areas where the terrier may have dropped pieces. Cats are especially sensitive to anticoagulants — even licking a small crumb off the terrier's fur could put them at risk.
The step-by-step response, from the first minute to the vet visit, is in our Anticoagulant Rodenticide Toxicity in Dogs and Cats emergency guide.