Hi Robin, bless you for saving these babies. The canned KMR tends to cause kittens to have diarrhea and the powdered causes constipation. As long as they don’t seem to be dehydrated, and they are eating fine, then I wouldn’t worry about the pedialyte unless they are going all the time and it is VERY liquid. I would switch them to goat’s milk as it will help settle their tummies and won’t cause the constipation or diarrhea from the KMR. You can find it in the cold milk section of the grocery, or in the baking aisle in cans. The canned is condensed so just add water 1 to 1. I raised my last kitten on it entirely and he did so well. I am going to post some links for you that will help with their care. I refer to them when I am raising kittens as I forget the little things sometimes. You are doing all you can at this point for their fleas, as they are too young for flea meds. But washing them in Dawn will kill the fleas and you can take a damp washcloth and wipe their eyes and ears and noses to remove fleas. As long as they aren’t covered in fleas, they will eventually die off.
http://messybeast.com/handrear.htm
http://www.safehavenforcats.com/newborn.htm