Hi Nxthan, welcome
How old are your bunnies? I’m guessing they are babies?
Babies are very hard to sex accurately. Babies also do not form true bonds, but do get along with other bunnies. Mutual grooming is a normal behavior among babies and bonded pairs of any sex. So definitely not possible for us to tell just based on that.
I will say that you should plan to separate them at 12 weeks, even if you think you’ve got two males. You’ll want to prevent pregnancy if you do have a male and female. If you have a same sex pair, hormones can kick in and the bunnies can start fighting in a flash. Males especially can hit puberty very rapidly and get aggressive without warning. It’s much easier to bond them once they are neutered/spayed if you separate before fighting happens.
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The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.