The present disclosure relates to methods and compositions administered to the lymphatic tissue of an animal to prevent or reduce the incidence of disease or disease symptoms caused by one or more disease causing entities. Tonsillar compositions can be administered to the lymphatic tissue in the oral/nasal region of the animal and can include avian antibodies from eggs of hens inoculated with one or more target disease causing entities. Treating the lymphatic tissue in the oral/nasal region with the compositions described herein can reduce or prevent the disease causing entities from adhering to the lymphatic tissue resulting in reduced infection rates. The present disclosure also relates to oral compositions that can be used to reduce or eliminate oral pathogens in animals.