I think I know the answer but I'll ask anyway...

[Automaton539]

Ok, just lately one of my girls, Dizzy, absolutely won't let the other rest. 9/10times when Bigfoot is just minding her own business Dizzy will just come close enough so she's out of reach, so as to not startle Bigfoot, then just lunge right for her trying to nip her hindquaters. Is this potentially because she's still not spayed/what time of year it is, or do you think it might be something else?

 

[Coineanach]

Is this potentially because she's still not spayed

Nail on the head, which I think is what you expected. Are you planning on getting her done? I'd keep a close eye as unspayed bunnies can be very aggressive if Dizzy decides to actually go for Bigfoot.

 

[Automaton539]

I thought as much yes, and yea, the moment I have enough cash I am certainly getting them both seen to.