Not a fan of flea collars
I don't use collars, and as far as I know, they are not necessary if you use the topical treatments. I would use the comb and dispose of the fleas quickly and carefully. I recommend you quickly put the flea and the hair in a zip lock bag and then pinch the flea to death.....then dispose of the contents in the toilet.
The sooner you get the fleas off the cats, the faster your problem will be resolved.
Gosh, I hated having fleas....thank goodness for the topical treatments. Once you get rid of the fleas, the monthly applications will seem easy! My cats don't like them, but hey, the don't have a choice!
Good luck!:eek: