Baytril is for large animal only. It is non returnable.Cattle: Baytril® 100 is indicated for the treatment of bovinerespiratory disease (BRD) associated with Mannheimia haemolytica,Pasteurella multocida and Histophilus somni (previously Haemophilussomnus) in beef and non-lactating dairy cattle. Swine: Baytril®100 is indicated for the treatment and control of swine respiratorydisease (SRD) associated with Actinobacillus pleuropneumoniae,Pasteurella multocida, Haemophilus parasuis and Streptococcus suis.