There are very few herp vets. When they advertise "exotics" they are really talking about mammals, not reptiles. There really isn't much in the way of "herp veterinary science." In most places your better off figuring out what's wrong, and if you need any medications ask the vet to prescribe them. And I understand your thinking about how there is a shortage but the reality is that most herp keepers don't bring their pets to the vet. Not to sound callous, but most people will not spend hundreds of dollars to have a frog that they paid $5 for checked out. As for the cricket gel, i doubt thats what caused the impaction. The only way I could possibly see that is if they swallowed dry crystals and the crystals expanded, but if that had happened the frog probably would have "blown up." I doubt a frog would have any trouble passing small amounts of the gel.