I would go with what Heather said. It shouldnt be hard to force feed. Make sure its the UNFLAVORED pedialyte and its 10 parts water to 1 part pedialyte. With the soak, and a cricket, you should see a difference.

Have you tried emailing Dr Frye? He has always gotten back to me. If you are scared to force feed, there are some good tutorials on youtube that show you how. I wouldnt put the frog down just yet. If you think its suffering, a good cricket and pedialyte soak will surely help with that and maybe it will end up living a full healthy life.