Allethrins are toxic to cats
[2] because they either do not produce, or produce less of certain
isoforms of
glucuronosyltransferase, which serve in hepatic detoxifying metabolism pathways.
[3]
en.m.wikipedia.org
In cats, signs of poisoning include profuse drooling, vomiting, tremoring, hyperexcitability, agitation, seizures, weakness, and difficulty breathing. Untreated, it can be fatal. These signs are rarely seen in dogs. In dogs, signs of parasthesia (a tingling sensation), scratching, drooling, etc. may be seen.
Pyrethrins & Pyrethroids are toxic To Dogs. One of the most common ways dogs are poisoned is by inappropriate application of cat flea & tick medications.
www.petpoisonhelpline.com