NAF Mud Guard Supplement is a specialist supplement for horses living in wet, muddy & challenging conditions offering nutritional support for skin. This supplement designed for horses prone to mud fever when used in conjunction with topical barrier creams can provide a high level of protection for your horse or pony against bacterial & fungal skin infections. NAF Mud Guard Mud Fever Supplement works at its very best when used just before the beginning of the season to help prevent mud fever from establishing.