My indoor cat got fleas!! She is long haired and her fur is really thick! I used a flea comb on her, and got one flea. I used zodiac flea and tick powder (I’m not sure it kills eggs tho?). I combed her again and got nothing. She doesn’t seem to be itching as much, but I know she was bit and had a reaction so it will take some time to completely stop. How do I know they are gone? Could she have only had one flea? I vacuumed the most frequented carpets and washed my bedding. Its so hard to tell with her long thick fur….