You need to mix some Echinacea in water and put it out every day for a few months to help Boost their immune System. Use 1 capsule to 1 gal. of Water.
The Only Echinacea My Out side Squirrels will drink is GNC Bran Echinacea. It is in the glass bottle.
All the Other Echinacea has a bad taste or after taste. Wild Squirrels stop drinking it. Best to use GNC Bran.
I mix Mine in the Juice Judge, or Milk Container after they have been empty.
I offer my wild Squirrels out side, some 2 times a year for 2 months to help them out.
I mix 1 capsule to 68oz when the Squirrel Pox is Bad.
I have had good luck turning Squirrel Pox around with just offering Echinacea Water and Offering Extra Food,. (Healthy Vegetables and Nuts. Just to help the Food shortage )
You should notice a difference with a week or two. First the Pox stops popping up. Then they will dry and turn black. Then fall off. (You might need to treat for Mange later.)
Good Luck.
PS
It will not hurt any of the Wild Animals if they Drink or Take a Bath it it.
Birds, Coons,Rabbits, and Deer drink it. No Problems.