Marvel Aid 16 Oz. An Antibacterial Liquid Which Is Intended Of Oral Use In Caged Birds. Marvel Aid Is Effective In The Treatment Of Bacterial Infections Which Are Susceptible To The Actions Of Sulfadimethoxine. Symptoms Of Bacterial Infections May Include, But Are Not Limited To: Ruffled Feathers, Sleepiness, Listlessness, Diarrhea, Loss Of Appetite, Loss Of Weight, Nasal Discharge And Difficulty Breathing.