I see you've gotten great help! A few tips for keeping them outdoors:
In the summer, I suggest getting them a fan. It'll help keep air moving and also keep them cooler. Also, freeze water bottles and stick them in there for them to lay against. I have also just literally frozen chunks of ice in old sour cream or similar plastic containers (sometimes they crack after one use, though) and stick the whole thing in there. Your bun won't get very wet if at all from either of these options, but it'll help keep them cool during the hot months! Mine loved to lick the ice, too.
Sometimes I would stick ice in their water to help keep it cool, but that's not a very certain thing to help rabbits stay cool, since they might not drink very much from it before it goes warm again. But that's something you could always try!
Lastly for the heat, I suggest picking the shadiest spot (if you have any shade trees) in your yard for them! I know you'll stick them where you know is best, but if at all possible, keeping them out of the sun as much as possible really helps.
Two ways to really tell if your rabbits are getting hot as well is to see if they are panting hard or not. If their sides are really moving and they are panting hard, then they are probably pretty hot. Also, you can feel their ears to sort of 'check' their temperature. If their ears are really hot, that means they are pretty warm.
I think on your other thread there was talk about how to keep them warm during winter, so I won't go much over that! But like I mentioned on that thread as well, stuffing their cage with hay, offering rag towels, and using a heat lamp are all good options for helping keep your buns warm.
Lastly, some tips for overall health:
I suggest doing a check-over of your rabbits every so often. Really look at their eyes, in their eyes (with a flashlight!), look at their front teeth, check all their nails. You can do it when grooming or trimming nails. That way, you can really look over your bunnies and make sure everything looks normal.
Another thing to check/clean (but is pretty gross) is actually their scent glands! Those can get blocked up and gross sometimes. If you don't know where they are, you can look at a video online to help. But it's right down on either side of their private parts: gently pull them apart and use Q-tips with a little mineral oil to gently remove any build up. Like I said, gross, but it keeps your bun happy and healthy!
One thing I always suggest to have on-hand is something called critical care, too. It's a powder you mix with water that is packed with nutrients that you can feed your rabbit when it's sick or not eating. I swear that this stuff has helped save my own bunnies' lives at some points. It's really good stuff. Plus, you can make it as thick or thin as you want, and is a really good thing to use to get medicine in them if you ever needed to.
We keep a pack of this in our freezer to keep it fresh at all times.
Best of luck to you and your future bunnies!
Odd was just trying to help and make sure my bunnies where happy, and I should not have snapped like that. Yikes. Again i am so sorry 
