I wonder if you could gently push it back in? Have you tried calling some place like PetSmart or Uncle Bills that sells frogs? Have you done an internet search about how you might deal with it?
I'm sorry I don't know how to humanely euthanize them.
Good luck!

your post has gotta be a first for the garden web pond forum!

i had a hen with the same problem, used vaseline on my rubber-gloved finger and pushed the prolapse back in and all was fine again for her- she even continued to lay eggs.

a frog tho?- hmmmm. i donno. maybe IF you can catch it, use vaseline on a q-tip and try to poke the prolapse back in place? i'm very unclear about a frog's personal anatomy tho, so can't imagine if this is even possible. poor thing - nature just might take care of this problem herself but, like you, i would want to help.

if you decide to euthanize, maybe wrap it in something soft and put it in a freezer? or drop it in boiling water like we do with innocent but delicious lobsters. both ideas make me sad.

min

Poor thing! Must be a horrible case of hemorrhoids. I agree with the others that it could be gently pushed back but I think you should anesthetize it first. They grow dormant in freezing temps so putting it in a plastic container and then into the freezer would work. If you want to keep panic to a minimum, a drop of oil of cloves in the box might work. It is used on fish and might work for frogs. It is used to euthanize fish too so err on the side of caution. Don't use antibiotics that are used for humans. Sandy