I just started litter box training my 1 month old kittens 4 days ago, I think that only one of them is having a movement, I have actually seen this particular kitten have movements, but when checking the litter pan at the end of each day I still only see that one movement that that particular kitty had that morning during his usual morning routine ;0 He however is the only one right now that has started eating some solids, rest are still mainly on mom's milk only, the other ones are peeing lots just no BMs , making me nervous.

Usually the mother cat teaches her kittens how to use the litter box and will lick their little bottoms to encourage BMs. Isn't the mother doing this?