I agree with Kili about the incident, with Holly. Hazel had no way of knowing that Holly enjoyed Bluebell's jokes. Many other rabbits probably wouldn't have appreciated them (especially under these circumstances), asking Bluebell to stop was the right thing to do

But it seems that Hazel gets impatient at Bluebell several times afterwards too, even in lighter situations. For example, when Bluebell suggests that Bigwig disguises himself as a hrududu and drive across the field with the does

he gets a blunt "shut up" from Hazel

I suppose everyone has their favourite rabbits, and least favourites (earlier in the book, it is implied that Hazel doesn't like Hawkbit very much either

)