Normal: 199 mg/dL or lower cholesterol levels. Borderline High: 200 to 239 mg/dL cholesterol levels. High: 240 mg/dL or higher cholesterol levels. A person with desirable (normal) total cholesterol levels is usually at low risk for heart disease (this depends, of course, on their total risk profile).
Most pyrethrin poisoning happens when a well-meaning owner uses too much of a pyrethrin-based product or uses one that is too strong for a cat. Kittens, elderly cats and underweight cats are even more susceptible to pyrethrin toxicity. This is because their bodies can't process the chemical as well, and the lack of a protective layer of fat allows the chemical to soak right into muscles and tissues.
These have an advantage of being even a bit less toxic than pyrethrins (still toxic to cats, though!) and less insect resistance. There are dozens of pyrethroids on market now (presumably in an attempt to stay a bit ahead of the insect resistance problem). Just about any poison that ends in âthrin' is a pyrethroid (eg.