I have 2 rabbits, one is 8 weeks old and the other is a year and a half. The older one is a male and he IS neutered and litter box trained, and the younger one is female (will be spayed at 6-7months) and her litter training habits are okay. She does have accidents sometimes but for the most part is pretty good.
The younger one lives in an XL dog crate, but since she is so small i divided the cage in half with a divider, which I will take out when she's older. The older male rabbit lives in an xpen but its bigger than usual so the measurements are:
6'10" by 28" with a 40" by 27 and 1/2" second shelf attached to it. Is that big enough for 2 holland lops? PS. If you saw my other post asking if my rabbit was a holland lop or mix, I think she is a purebred, clearly not show quality but I asked the breeder and she said she does not breed mixes, and showed me a picture of the mom and dad. Types can vary widely in purebreds - especially if they are not show quality. Anyway, I adopted my male rabbit so I don't know if he is a holland lop, but i highly doubt it. But he is around 4lbs, and hopefully my baby bunny will also be around 4lbs - average size of a holland lop.
Is that xpen big enough for TWO rabbits? I mean personally, eh I'm not sure. The xpen is 42" tall by the way, I don't really think I can make the cage any bigger? But I do plan on taking them out of their cage everyday for a few hours AT LEAST, I always take my rabbits out (at separate times obviously) it is a bit hard since they need to be separate at all times, but it is possible.