I would use the frozen water bottle, but I cover it with a soft sock so my bunnies would love to cuddle it. Then I would put ice cubes at their water. I also use those cooling beds that are for dogs or cats. My bunnies love it when it’s inside their hidey house.
If having a cooling bed is too expensive you can just make a DIY cooling bed. Got this idea from some doggy lover.
Items that you will need are:
1. A small air mattress or those small inflatable pools floats
2. 5 cups of rubbing alcohol
3. 5 cups of water
4. 1 bottle liquid dish soap
5. Superglue
Steps:
1. Make sure the air mattress has no leaks. Unroll it.
2. Gently mix the rubbing alcohol, water, and liquid dish soap. Do not create a bubbly foam just make sure it’s just mixed with not too much bubbles.
3. Now fill the air mattress with the mixture.
4. Squish out the excess air as much as you can.
5. Make sure the valve or the opening of the air mattress is dry. Then close it up with the super glue.
6. Now, roll the whole thing up, as small as you can and tuck it into your freezer. Check on it every hour to make sure it has that watery texture not a cold slab of ice.
7. Put the gel pad air mattress under a blanket and watch your bunnies sleep there. Make sure the blanket is a strong blanket you don’t want the bunnies clawing the air mattress.
Note: Do not freeze this all the way your bunny could have ice burns.