Hartz UltraGuard topical liquid products for cats all contain the active ingredient etofenprox. Etofenprox is classified as a synthetic non-ester pyrethroid that is effective against fleas and ticks.
Late April and early May is considered “tick season,” and pets – especially cats and dogs – are at a high risk to carry them. Thankfully, there are products to help prevent these insect infections.
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