"i have 2 syrian hammies and they had only slept in the corners of their cage because all the other houses were just too small. Jingle is a male and he is chubby, so i had to get him a big house to sleep in. i got him the small size in green and i put it in his cage. the igloo took up quite a bit of room but it was still kind of roomy. he just touched it, lost interest, and went to the corner to sleep again. when he got sleepy, i picked him up and put him in the igloo and he fell asleep.
it is well-ventilated and is VERY easy to clean. every week, i just rinse it with water and scrub it with soap. it's also comfy and roomy for Jingle, so he doesn't have to be squished."