How drying changes (but doesn't reduce) the risk
Drying concentrates foxglove's cardiac glycosides—what looks like a brittle, harmless leaf in your arrangement packs the same toxic punch as fresh foliage. For your 8 kg dog, this means even small fragments matter. The drying process breaks down cell walls, potentially making toxins more readily available when chewed.
Floral arrangements add another danger: pesticides or preservatives on the leaves could compound the poisoning. If you're unsure how much was eaten, assume the worst—dogs often shred dried leaves thoroughly, making it hard to estimate ingestion amounts accurately.
Size makes this an extreme emergency
At 8 kg, your dog has minimal body mass to buffer the toxins—what might cause mild symptoms in a larger animal can swiftly become lethal. Cardiac glycosides don't scale linearly with weight; they disrupt cellular processes that affect all dogs similarly regardless of size.
Watch for subtle early signs like refusing treats (unusual for small dogs) or seeking solitude. Small breeds often mask distress until they're critically ill. Their faster metabolisms also mean symptoms may appear sooner than the typical 2-hour window—sometimes within 30 minutes.
The deceptive danger of small amounts
Half a dried leaf could contain enough glycosides to fatally disrupt a small dog's heartbeat. Unlike some poisons that cause obvious gastrointestinal distress first, foxglove's primary attack is on the cardiovascular system. Your dog might not vomit at all before experiencing life-threatening arrhythmias.
Don't rely on visible plant remnants in the mouth—the bitter taste often makes dogs swallow quickly. Check between teeth and under the tongue for green stains, but assume ingestion occurred regardless. Time matters more than precise quantity in small dogs; their systems can't compensate for even minor toxin loads.
Why you can't wait for symptoms
By the time a small dog shows obvious signs like collapse or difficulty breathing, their heart may already be failing. The toxins work silently on the electrical impulses controlling heartbeat—something no owner can monitor at home.
Emergency vets will prioritize intravenous lipid therapy to bind the glycosides, along with continuous ECG monitoring. Small dogs often need more aggressive treatment than larger ones because their circulating blood volume is so limited. Every minute counts—this isn't a 'watch and wait' scenario.
The step-by-step response, from the first minute to the vet visit, is in our Foxglove (Digitalis) emergency guide.