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Rabbits should not touch Dog Fennel; toxic plant.

Dog Fennel

Eupatorium capillifolium

No—rabbits should not eat dog fennel. This tall pasture weed (Eupatorium capillifolium) is toxic and is not the same as edible fennel bulb or fronds. Pull it from pens and forage areas, and if your pet chewed any, call your veterinarian or a poison hotline while you keep unlimited hay as the daily baseline.

Guideline: Poisonous

Type: Outdoor Plants

Other Names: Dogfennel, dog-fennel, sneezeweed (E. capillifolium), thoroughwort, cypressweed, stinking mayweed (Anthemis cotula, also called dog fennel in some regions)

Dog fennel (Eupatorium capillifolium) is a tall southeastern pasture weed with finely dissected, thread-like leaves and a strong smell when crushed. It is not the same plant as grocery or garden fennel (Foeniculum vulgare). Some regions also call stinking mayweed (Anthemis cotula) dog fennel—another daisy-family weed, not a salad herb.

Often Mistaken For

Is Dog Fennel item toxic?

Yes. Dog fennel (Eupatorium capillifolium) is unsafe for rabbits, guinea pigs, and chinchillas. Pasture sources report toxins including tremetol and pyrrolizidine alkaloids that can harm livestock; safer bias is never allow small pets to eat any part. Plants also labeled dog fennel (such as Anthemis cotula) are likewise not food—treat as toxic weeds, not kitchen herbs.

Should I feed my pet Dog Fennel?

No. Do not feed dog fennel to rabbits, guinea pigs, or chinchillas.

How much can I feed them?

Do not offer as food. If your pet ate dog fennel, contact your veterinarian or a pet poison hotline right away.

Poison Control Hotline Information Need a Vet?

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