Methanol is found in a variety of consumer products including windshield washer fluid, paint thinners, and household cleaning products. Ingestion can be very toxic to pets, particularly cats and dogs.

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Signs and symptoms of toxicity: Clinical signs of toxicity include depression, fatigue, sedation, difficulty walking and decreased body temperature.

Toxic consumption:
In dogs, 5 – 11.25 mL/kg (2.2 – 5.1 mL/lb) of undiluted methanol may be toxic, even fatal. There is no established toxicity threshold in cats. All incidences of exposure should be reported immediately.

Dogs: Methanol 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
> 2.2 mL > 24 mL > 58 mL > 92 mL > 161 mL > 206 mL

 

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