I have two gerbils in a glass tank. It's huge and has a wire mesh top. It's mostly full of wood shavings that they burrow in. With two shelves for food, water and sand bath, and a big card tunnel between the two (that they are working on destroying).
Noticed one of them this morning was panting a little and a lot stiller than usual. Her little nose is redder than I've noticed before.
I'm assuming she's hot. They are in the coolest room in the shadiest place. They aren't animals that are easily handled. She has never bitten us but she's very fast and will only sit on my hand for a few second before she leaps off it!
What can I put in their cage to cool them down? They nibble EVERYTHING!