Doxycycline 100mg tablet Indications Treatment of respiratory tract infections including rhinitis, tonsillitis and bronchopneumonia in dogs due to organisms sensitive to doxycycline including: Pasteurella spp., Bordetella bronchiseptica, Staphylococcus aureus and other Staphylococcus spp, and Streptococcus spp. Treatment of arthropod-borne Ehrlichia canis, infection.