I gave them bigger Silent Spinners medium size, 2 of them, side by side
Now I can put more bedding in there next time, as the wheels are higher than the mini size ones
(They spin without resistance, I had them amongst my hamster stuff)
I might not do the cage upgrade, right now I'm thinking not but I'll keep the 15 gal anyways
It's too risky of ruining a good thing vs fighting over territory if they had a bigger cage.
They are happy but if they grow a lot more then I'll try the bigger cage with observation
The girls must not like me lifting their houses up, so now the sleep underneath the bedding under one of the houses together.
The hammies don't like me picking up their houses. So they sleep together beneath the bedding. Guess I'll have to wait till their awake to interact with them. They are soooo cute!