How often should DE be applied to goats and dogs to prevent live and fleas?

[307151]

I got a new goat in the summer time who was infested with lice, I applied DE every few days on him with no luck, so I treated the goats with permethrin and figured I would just use DE as a preventative treatment, but how often do I need to reapply it?

 

[Ozarkhomesteader]

we had to do it every other day. With the goats it was not a problem, but if your dogs are house pets, i would not do it on them...it is fine to drink, but DE actually should not be inhaled through the air...i have lung problems from it.