If it was an upgrade I'd do it
But Newtie has always been in the same cage and it's big enough so can't really
. If it had narrow bars I might be tempted to upgrade Nugget.
Which reminds me - when I first wrote to Savic I said - people want a 100cm Hamster Heaven but with 7mm bar spacing! Such a shame they didn't do the narrow bar spacing as then it would be fine for all hammies. I guess they think Robos can have a different cage