thank you so much for the prompt response, yes i do usually house them all together, but i do have him separated now (in the honey bath at the bottom of a critter keeper). I bought him from petsmart a couple months ago, supposedly captive bred. Parasites were my first thought as well, but the sudden onset and behavioral change was what concerned me. I actually just picked up some panacur yet it is the paste not the powder so I am wary to use it unadvised. What would you recommend to be the best treatment for him? And what all should I do to their main housing to ensure it does not spread to my other frogs, currently they are asymptomatic.