Hello. Fleas would be moving, & moving very quickly, so no apparent fleas in either picture. To tell if you have flea dirt ( which is actually flea feces ), drop some of the debris on a damp paper towel. If it is flea dirt, then a reddish brown to rust color will leach from each spot. If the debris just sits there with nothing happening for several minutes, then it is just run of the mill dirt. Thanks for contacting Petco Pet Education Center, formerly Petcoach.