I'm glad to hear that about the red in the coloration. I think I have seen other Pacmans do the same thing. Lose green and keep or gain red coloration. The victim is a green frog. There are tons around and to cut back on cost I usually get my own worms and feeder frogs. I know some people are against "frog eat frog" or "frog eat mouse". Thank you for the caution about the parasites.