Editor's note: Flea and tick shampoos that contain pyrethrins and permethrin are toxic to cats and can be fatal. With exposure, cats can develop symptoms such as tremors, twitching, and vomiting.

If you haven’t already started gathering your arsenal of tick and flea repellents and heartworm ... Active Ingredients: Imidacloprid 8.80%, Permethrin 44.00%, Pyriproxyfen 0.44% No Prescription ...

Sentry Flea and Tick Shampoo with Oatmeal may be a good option. Its active ingredients — permethrin and piperonyl butoxide — work together to kill fleas and ticks for up to 10 days ...

Ticks are most active when the temperature rises above 40 degrees, according to Grayson. He said the solution to avoiding ...