Give them time. My bun Bullet didn’t want anything to do with coming out for about a month (with the cage door open 24/7), and after that it took him even longer to warm up to me. Picking them up only hurts their trust in you. You can leave the door open whenever possible if you want them to get used to coming out, and to bond with them just sit on the floor and read or do schoolwork. Although it may take awhile it will be worth it in the end.
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At first I was worried he may never come out because he spent all his time in the cage.
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About a month later he started exploring and sniffing me, but still wouldn’t tolerate petting.
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It has about 8 months since I brought him home now. He still only tolerates pets on occasion, but he loves to jump all over and lick me.
Every rabbit will be different in how fast they warm up to you and how friendly they get. My rabbit Dune was friendly right off the bat, both then and now he is a total attention hog who loves to lick. My bunny Opal from the beginning was a bossy little miss who wanted everything her way, you would give her attention when and how she wanted it and go where she wanted you to, while still getting no licking in return.