Does anyone know of any over-the-counter tick medication for dogs that's not highly toxic to fish and aquatic invertebrates? Everything I've chedked out is toxic to fish. My dogs swim in my pond every day. Dogs aren't supposed to be bathed for 48 hr before or after application of the topical stuff I've been using because it washes off. I have spray on stuff that can be used fairly often, but it has the same toxicity to fish, it's never been particularly effective, and some is also toxic to my cat.
