Honestly - at this stage he doesn't need formula - he just needs food. He is 1 wk off 6mnths.
You have done such a great job. If he is happy and healthy he doesn't need to be weighed - it just doesn't matter very much. You have done a fabulous job feeding him so well - time to start solids.
BTW - lactation cookies really....just....don't .....work.. There are really no active ingredients.