awwwwww gorgeous bunnies!!!
Mine do go on their back for when they are grooming (just so i can check their bottoms are clean, and a quick brush to make sure no matting) and for their claws to be clipped, but i dont do it for long, I didnt know it can cause their heart rate to slow, I have heard of it being in the judging process, again it isnt for long, just a quick check to see if things are all in order
your black one looks just like our boy link
a mini lop bred my our lovely lisab (along with his sister, who is black otter
)