The one that I originally had, double it size in a matter of less than 3 months.

Like you, i keep mine at room temperature too.

"And you don't need to feed them in winter. Around thanksgiving, put them in the coolest room of your house without any heat - and make sure no live crickets are in their enclosure. Other than making sure they have fresh water available, you can basically just leave them alone until spring."

Is this what you call brumatting? How can they live without food during this time? Do they lose size?
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I will be back!