When she brought back the gators one of them bit the man next to it (could easily just be instinct), but another one ran out of the water (a sizeable distance) and ate the hunter on the ground. This instance isn't great evidence, but does support the theory. Then in episode 5 when the coyotes are sniffing around Myrtle's body, she approaches and they run away. I wouldn't normally think anything of this, but the music changed just before they ran away. The music change and her face made me think she may have made them go away.
I don't know if this is simply the coercion power Fiona and Madison both have, or a different power all together, or maybe the gators were just coincidence and the coyotes ran off because animals can sense and fear magic in general, but I am interested to see what other fans have to say!