True, they eat insects in the wild because animals don't know when next meal is coming. Yes, constipation is slowed and difficult movement. Impaction can be life threatening if its not moved properly thru GI tract, especially made worse with type/size of food and inactivity. How does someone conclude a frog is "sensitive?" If I eat tons of popcorn, have severe LLQ pain for several days and can't move, am I just sensitive or could I have diverticulosis? or an impaction? what if I had a localized mass with infection/abscess? gangrene? perforation? You can't tell exactly how frog feels nor should frog suffer ( can tell if it dies and autopsy is done). What I am saying is, why take the risk when owners have a choice that won't even come close to causing an impaction? Many people are sensitive to foods and they have the option of choosing different food. A frog in captivity doesn't. I'm not crazy about giving mine crickets, but they gobble the small ones which look much better than the large boney ones. Its like giving a dog rawhide made in China. This causes all kinds of havoc. Dogs don't know any better, people should though.

Gluten and allergy are not the same thing as impaction. I am not trying to make someone feel bad, but felt an impaction and a sick or ill frog warrant talking about what it is fed. I understand your point and I hope that person can offer different food. I can't imagine certain insects getting thru a frog's GI tract safely. Some do die in the wild from eating the wrong bug. But, as pets it makes sense to me to give food that is as safe as possible. I'm speaking on behalf of frogs since they cannot speak. I've got to go to bed, otherwise I'll be up typing all night. Tomorrow I can try to read about frog digestive systems and enzymes they have. I have fiber powder in case mine look bloated or have signs of not feeling well. Hope what I wrote helped.