Sick frog

[Sanimal]

Hello fellow frog forum members. I believe one of my Hyla Cinereas is sick; he is lethargic, was sitting at the bottom of the terrarium for a few days, and (I believe) has not been eating (even though he is not skinny, he may be bloated). I don't know what the last time is that he ate. So I moved him to a quarantine, plastic cage with damp paper towels, a small water bowl, and a small plastic plant; then I placed the cage in a low traffic area of the house. I also placed a cricket in there for him yesterday, and he has not eaten it. I still need to see if he poops, because I believe the feces I find in the cage may be from my other frog. One thing I noticed is that his belly is not the creamy white, but it seems that you can see into it (see attached pictures); it has some blue and red discoloration. The other thing I noticed is that when I moved the frog to the quarantine tank, his belly didn't feel soft, but it felt firm on the inside (impaction?). Should I give him a honey bath? Further, I looked at the first aid article on this forum, but I'm still not completely sure what it is. Also, I do have a veterinarian that specializes in amphibians, but they are closed over the weekend, and on labor day. Any help would be very much appreciated.

Sanimal