@chris: I've experienced sth. similar... my dolly isn't much of an eater (it's like that since I've got her, she's also a very shy and timid little one) and for about two weeks she didn't eat anything. so I thought I try putting her in an extra tank and leaving her there for a couple of hours at night with a few locusts so the others won't eat them all up before she feels secure and in an eating mode.

since we've had an empty 10 gallon tank (our old aquarium) I've made her a small setup (plant, hiding place, some wood for her to climb on and a bowl) and put her in. but after about half an hour I had to take her out because she was running around like crazy, trying to escape and finally she started jumping against the lid on the top... she was so freaked out I almost didn't manage to catch her(!). when I put her back into her usual tank she was calm again.

so it really might be your tank's size. my other two frogs don't mind if I put them in there, so it seems to depend on the frog's character what size they're okay with - that's probably because your dumper doesn't act like that. I keep fingers crossed she'll be happy in her new enclosure.