Hi there, welcome 🙂
So, in a bonded pair, face humping is less of a concern, but you do want to be sure they are truly bonded (esp since yours are newly bonded). With my first pair, during grooming my girl would shove her head so far under my boy it would trigger some face humping. Half the time she wouldn’t notice and would think she was still getting groomed (LOL), other half she would run off and that was all there was to it.
What happens with yours? Are both doing the humping? Does it lead to bickering? Is it out of the blue or triggered by grooming requests? Do they go right back to cuddling and grooming after?
Bonded pairs can have some level of mounting or mounting attempts, and as long as no bun seems upset about it it’s usually fine.
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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.