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Bromethalin-containing rodenticides are toxic to all animals, especially cats. Toxicity mainly occurs due to cerebral edema. It’s important to note that anticoagulant rodenticides also have a risk of toxicity if ingested.

Signs and symptoms of toxicity: Clinical signs of toxicity in dogs include weakness, paralysis, tremors, seizures, and coma. Cats are more prone to show paralytic signs of toxicity.

Toxic consumption: In dogs, ingestion of 2.5 mg/kg (1.1 mg/lb) of bromethalin can be fatal. In cats, the toxic threshold is lower at 0.45 mg/kg (0.2 mg/lb).

Dogs: Bromethalin Toxic Consumption
X-Small
Yorkie, Chihuahua
Small
Pug, Boston Terrier, Poodle
Medium
Beagle, Scottish Terrier
Large
Boxer, Cocker Spaniel
X-Large
Retriever, German Shepherd
XX-Large
Great Dane, St. Bernard
1 – 10 lbs.
(0.45 – 4.6 kg)
11 – 25 lbs.
(5 – 11.4 kg)
26 – 40 lbs.
(11.8 – 18.2 kg)
41 – 70 lbs.
(18.6 – 31.8 kg)
71 – 90 lbs.
(32.3 – 40.9 kg)
91 – 110 lbs.
(41.4 – 50 kg)
dog1 dog2 dog3 dog4 dog7 dog6
> 1.1 mg > 12 mg > 29 mg > 46 mg > 80 mg > 103 mg

 

Cats: Ivermectin Toxic Consumption
Most Cats

Large Cats
1 – 10 lbs.
(0.45 – 4.6 kg)
11 – 25 lbs.
(5 – 11.4 kg)
cat1 fat cat
> 0.2 mg > 2.2 mg

 

References:
Osweiler, G, et al. (2011). Blackwell’s five-minute veterinary consult clinical companion. Small Animal Toxicology. [Kindle version]. Retrieved from Amazon.com