Most Rabbits cope with our Summers but I have 2 small Netherlands which can start to tremble when it gets very hot. I am not sure why they do this, maybe someone knows, but I am assuming it is not a good sign and I shall be keeping a careful eye on them and will bring them indoors where it is cooler. I have also noticed this year that although they aren't drinking any more or less, they aren't weeing as much, so I assume liquid is being absorbed in another way. Just thought I would mention these things.