How Long Can Dog Goop Without Flea Treatment?

How Long Can Dog Goop Without Flea Treatment? Flea eggs can survive for about 10 days, tops. “If they don’t hatch in 10 days, they won’t,” Dryden says. Flea eggs need a warm, humid environment—anywhere from 70 to 90 degrees and 75 to 85 percent humidity. Under ideal conditions, flea eggs can hatch their larvae