Me, DH, our toddler DD and cat have arrived at my in-laws and are staying over Christmas and NY. My BIL and wife have recently gotten kittens and are due to also come down for Christmas, they'll probably stay a week (everyone lives far apart and we have always had long christmases together). BIL texted the family WhatsApp group on Fri saying the kittens have fleas. They have delayed their journey to try and get rid of the fleas as much as poss but are still coming down. I've read flea infestations take at least 2 weeks to get rid of, and concerned that my toddler (who crawls on the floor / licks things constantly) will get bitten, and that we will end up taking the fleas back to our home too but I've never dealt with fleas before. Should I be worried? What would you do?