Did they buy this turtle or did they pick it off the side of the road? I would
be interested in seeing the turtle. So many people down here in Florida just take them out of their natural enviroment because they thing they can have a free pet.
My husband will stop and rescue any that are in the road and we take them home til we can make a trip the our state park and release them their back into the wilderness. Normally on the weekends.
Sounds like you have it under control with getting it a bigger cage.

I get so frustrated at petstore that sell red-ear sliders because they lead people to believe that they can keep them in these little bitty cages.

Last year I came home with five baby turtles

because this lady ticked me off when I commented to a potential buyer that they would need a bigger cage. She was so angry at me for interfering. I looked at her and told her I would take five and I didn't want any of her cages either. I walked out of that store with five turtles in five paper cups.
My husband couldn't believe I did it. If I could have I would have bought her whole stock. I would have needed bigger ponds but they would be in a more natural enviroment instead of a little bitty plastic cage.
I'm sorry, I kinda hijacked your thread. I wish you the best of luck. If you need any help let me know!