For those who do not use any pesticides, Diatomacious Earth is your best bet.
We have horses (4), rabbits (8), cats (barn?), dogs (8), ducks, (12) and chickens (over 100).
We use DE all over the yard, in the house, rubbed on the dogs and cats, in the barn and in the ducks pen.
It really works well. Neem oil also works well. We put a few drops on the animals after they have had a bath.
Good Luck!
We have horses (4), rabbits (8), cats (barn?), dogs (8), ducks, (12) and chickens (over 100).
We use DE all over the yard, in the house, rubbed on the dogs and cats, in the barn and in the ducks pen.
It really works well. Neem oil also works well. We put a few drops on the animals after they have had a bath.
Good Luck!