The most safe option is to sit and comb them with a flea comb to remove the fleas. It is tedious, but it is guarranteed safe.

You may also bathe them in dish soap. It doesn't actually KILL the fleas, but it will stun them enough (and make them easier to see in the wet fur) so that they can be removed. Dry the babies THOROGHLY to prevent a chill and catching a cold.


Since you say they are "4-6 wek olds" don't even use the revolution yet. Since you do not have an exact age it is best to just wait. But you can use the revolution soon whereas almost all other flea meds state over 12 weeks of age.