They will say anything to make a sale!
lol
I would look through the bedding really well...Corns are burrowers and very good at hiding. they are also very good at escaping! Which means...yes they can and do climb.
ps...one of mine got out a long time ago and I found him in my daughters piggy bank that was sitting on top of the enclosure.
I would look carefully in everything near the enclosure...and also try the flour trick.
Good Luck in finding the lil bugger.
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