Client Education: Your foal has had several intra-articular injections of gentamicin. Keep an eye on the fetlock for increased swelling, heat, or pain. Please let us know if this occurs and if any other joints start show similar signs. We recommend stall rest to allow healing to his soft tissues and cartilage, with brief intervals of controlled exercise. We have prescribed phenylbutazone and enrofloxacin for you to administer at home. Please give drugs as directed on the prescription. After the infection clears cosequin may be considered to help with the resynthesis of joint cartilage.