I would give him time and not force anything. You’re going to have him, assumably for the rest of his life, so you have time, no need to rush.

If he is from a child background, he needs to learn for himself that not every human will go “at” him and will leave him be. He also needs to learn that not every human is a loud, running, screaming child. He may be generalizing at this point, so you not providing that supporting evidence (petting, approaching, picking up) will help extinguish that association over time.

I’d say continually associate yourself with the presentation of food and do some hand feeding, but that’s it until he gets more comfortable.

Classical music helps my bunnies to relax and they really seem to like it. One of my bunnies was really shy at first, but I quietly sat on the floor and tried not to move much and he would come up to sniff me, and eventually he got pretty comfortable with having me around. Now sometimes he will just hop around behind me.

Patience and, if you are not doing so, spend as much time as you can at his level, ignoring him is best. Just watch TV, read, whatever. It took my Bridge bun, Olivia, about a year to finally realize I was her friend and for her to enjoy petting. I suspect she was also abused in the past. It can take bunnies like that quite a bit longer but give it time. One month is still very early in your relationship.

Patience; as the old saying goes, time heals all wounds. My Panda went through some unspecified experiences before being rescued that left her frightened of humans, and it’s taken her quite some time for her to build her trust to the point where she’s starting to be willing to allow me to pet her at certain times of days; she’s usually most amenable to petting at breakfast time.

On top of what everyone else has said, please separate your bunnies if they have not gone through the proper bonding process. First, your new bun didn’t have time to settle in, which means after a few months you could end up having a bun with a personality that’s different from the one in the first month. Second, if they have not gone through the proper bonding process, they are very likely to fight later on, especially if anything changes. You need to properly bond them so that their bond is cemented and little things will not make them fight.

Proper bonding process: let new bun settle and adjust to surroundings for 1 month, prebond for 1 month, then begin short sessions in neutral territory leading up to a few overnight sessions.