Join Date: Feb 2010
Location: Marin County California
Sorry to hear about your problem.
The problem with most de-licing products is that they can kill the lice but have no effect on the eggs. So once it looks like the lice are gone, the eggs hatch and the cycle begins all over again. You probably have a re-infestation problem as well. I would take a good look at the stalls if he is kept in one, and it would probably be a good idea to do a thorough cleaning/disinfecting of the environment. This can be done by cleaning all of the surfaces and grooming equipment with a bleach/water solution (1 part bleach to 10 parts water) followed by a permethrin spray or even a permethrin flea bomb if you can close the stalls completely (and then be sure to let it air out for several days before your horse goes back into the stalls). Also the if you blanket your horse the eggs are most likely in the blanket and saddle pads and underside of saddle...
Another option is to perform an entire body clip followed by a thorough washing, so the hair coat could start anew. I would, however wait until warmer weather before going with this step, unless there is an indoor facility where he could live until the weather starts to warm up.