Ive got 2 cats, they have just turned 1yr old and have just picked up fleas! we dont have a garden, just a courtyard and they have stil managed to get the bloody things.
Anyway, i have treated them both with frontline which says it kills fleas within 24 hours, i kept them indoors all yesterday but there are still fleas on them crawling around! can you give another treatment before the next one is due in a month if they havenot all cleared up?