Ask the boss lady if she wants to spend a few extra dollars in order the Safe-guard Aquasol.
@casportpony can you post a link to that one here please, I'm on the road.
Wazine can be bought over the counter here in Texas, a prescription is not needed.
Every feed store I have been to has it on the shelf.
Actually all of the 'regular' wormers can be bought over the counter here.
I would buy the Safeguard goat or horse wormer if I were you.