Well, they didn't show Judith anymore after Rick got her out of the crib in Service. What we saw in TNW was that Rick usually took Judith when he left and dropped her off to whomever was watching her, which would include FG. Rick trusts her with him, and he's proven himself when it really counted, and he has already stated that protecting Judith would be his No. 1 priority. He's gotten pretty good with that rifle and machete. I can't see Rick leaving her with someone that couldn't protect her if it came to that, especially now with Negan just popping up whenever. I'm thinking Olivia as well as long as Carl is there, and Carl told Rick when they were having their convo "who's going to be here for Judith?" So I think Rick dropped her off at Olivia's earlier, and Michonne knew that's where she was which is why she told Carl to be nice to Olivia. Can't see any other reason for him to be with her otherwise other than her helping him with his bandage, but I'm thinking that he can probably do that himself by now because Michonne told him to change his bandage, not get Olivia to change his bandage. That's all I've got, lol!