This will be administered by injection and will usually show dramatic results. Abscesses are pockets of pus under the skin. They are often caused by a bite or puncture wound that closed up trapping bacteria inside. Snakebites are notorious for causing abscesses. Occasionally an abscess will burst open on its own and allow for drainage, others will need a veterinarian to lance and clean it out.
Bacterial infections are often a secondary infection to another conditions.
A dog that has scratched or rubbed at an area and left opened skin without proper cleansing or antibiotic treatment will often have a bacterial infection set in. The infected area or wound becomes red, swollen, warm to the touch and very painful. This infection can worsen and cause a discharge of pus that will require a veterinarian to treat. Calluses are typically seen in the larger breeds that regularly lay on a hard surface such as concrete. These calluses usually occur on the elbows, outer sides of the hocks, hips and legs.