If you have done it that recently unless it says on the instructions to repeat with 7 days or something, then I wouldnt do it all again. You can check with a torch after dark, and wipe white paper round the ends of the perches to see if there is a tell-tale red blood smear.
Pale combs can mean almost anything, from just going into moult, to blood sucking insects, to mild or serious diseases. Its just that at this time of the year pale combs in this warm weather can mean redmite.
Ex-commercial birds can drop dead for no apparent reason at all, which is why the industry refers to them as "spent-hens"
Check what it says on the packs of stuff you bourght. See if the others begin to redden up and egg production increases. Check on shell quality, if they are going into a moult shells will often weaken and thin, and there will be more loose feathers around than usual.
All the best
Sue