Bird Marvel Aid 4 Oz. An Antibacterial Liquid Which Is Intended For 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 Infection May Include, But Are Not Limited To: Ruffled Feathers, Sleepiness, Listlessness, Diarrhea, Loss F Appetite, Loss Of Weight, Nasal Discharge And Difficulty Breathing.