Killing fleas the yardsale way

It's always this time of year that fleas get bad on the dog. So I gathered up all my flea killing stuff - and noticed that everything was bought at a thrift or yardsale. (So I took a pic). I used some of the Hartz spray on him, then a bath, then the flea collar. And the fleas are totally gone. I was ready to do the flea fogger in the house, but I may be able to wait on that.