Quote Originally Posted by MrFunkhouser View Post
Nietzsche and Shylock are roughly the same size, the smallest is the grey tree frog but most have been together for 4 months without any attacks, in fact, we've seen the whites and tomato sleeping next to each other quite comfortably. I spoke to the shop owner who told me he has another customer who has a 3ft wide by 3ft high palidarium which has 3 milk frogs, 3 whites and 3 golden flying frogs all living together, and all positively thriving. He suggested that humperdink may just be stressed with a lack of space, i'm taking him in tomorrow so he can have a look.

Would anyone be interested in doing a swap if the toxicity issue needs to be addressed?!
To be frank, you got lucky. Here's a link from the Firebelly Toad Article you might want to check out if you really want to house several different kinds of frogs together... Caudata Culture Articles - Species Mixing Disasters

This problem actually comes up quite frequently here. Here's so more topics on this forum that address it.
http://www.frogforum.net/tree-frogs/...g-species.html
http://www.frogforum.net/vivarium-te...vironment.html
http://www.frogforum.net/vivarium-te...ixing-zoo.html

I don't mean to be a pain. I'd just hate to see something bad happen to your pets. Especially when you acknowledge that one of them is already starting to get ill. Frogs tend to absorb things through their skin and thus having them in a cage with several others who are producing toxins is rarely a good idea... The only reason it works in the wild is because they have tons upon tons of space apart from one another and they aren't all trapped in a small space together at all hours of the day.