One of our horses had a virus & when getting over it we used Echinacea liquid & also Propel Plus. They allegedly help bost the immune system & blood cells in a lethargic horse. As far as I am aware there is no scientific evidence to prove echinacea works & I don't know if it worked on my horse or he just got better anyway. He is however now back to his old self.
I don't know if I would use Echinacea & Propel Plus together again because Propel Plus has echinacea in it anyway. I think I'd just use the Propel Plus, infact we're keeping him on it for the forseeable future.