There are multiple reasons a frog can be retaining fluids, this is not a complete list...
1) liver problems
2) kidney problems
3) bacterial infection
4) viral infection
You need to figure out which of the above reasons is the cause for the problem.
With respect to the antibiotics listed above,
1)oxytetracycline tends to not be effective anymore due to resistence of the targeted bacteria
2) metronidazole as an antibiotic only works on certain anaerobic bacteria which are not likely to cause the bloating
3) Ormetoprim-sulfa doesn't affect at least one if not more of the bacteria (there are more than 20 different bacteria that have been isolated from frogs with the implication that it caused the fluid retention) that have been implicated in causing this problem with amphibians and fish.
Ed
1) liver problems
2) kidney problems
3) bacterial infection
4) viral infection
You need to figure out which of the above reasons is the cause for the problem.
With respect to the antibiotics listed above,
1)oxytetracycline tends to not be effective anymore due to resistence of the targeted bacteria
2) metronidazole as an antibiotic only works on certain anaerobic bacteria which are not likely to cause the bloating
3) Ormetoprim-sulfa doesn't affect at least one if not more of the bacteria (there are more than 20 different bacteria that have been isolated from frogs with the implication that it caused the fluid retention) that have been implicated in causing this problem with amphibians and fish.
Ed