If your cat has fleas all over the house, you should use topical drops or sprays containing ingredients such as fepredronil and selamectin, which can be directly applied to the cat to effectively kill fleas.

Of course, if there are very few fleas on the cat, it is recommended to use drops and put the medicine on the cat's body. In areas such as the neck and head, the hair needs to be removed at the same time to allow the drug to directly contact the cat's skin; if there are many fleas on the cat, it is recommended to use a spray to spray the drug on the cat's head, neck, armpits, and groin. etc. area.