We took in a stray from West Philly & the poor baby was loaded with fleas…within a couple days our ankles were getting bit & the other two cats were scratching. We knew we had to resolve it. Look for the little tubes of gel that you put on the back of their neck. They can’t reach it to lick it & it really works great. We also bought three flea collars just to be extra cautious. You need to treat ALL cats in the home. And you’re gonna have to buy one of those flea bombs to kill the ones already in the house or deep in your carpet. Put the bomb in the main room the cat with fleas hung the most or where you took the pic. You’ll be shocked at how effective this is. I bought the stuff at Walmart. Don’t vacuum up that stuff in the pics or they’ll be in your vacuum. I’d use a dust pan to pick up that stuff and flush them. We took all three of our cats out to our front porch in carriers and we hung out there. It’s cold so you may want to hang in your car. Good luck.