have 3 northern grey treefrogs and kids added a true american toad, will they harm each other?

[venapla]

We have 3 tree frogs that my daughter found in the back yard when they were just under 1/2 inch or so. The oldest frog was found in June the youngest beginning of August.
We have them in a 18x18x24. Well she has now found a toad that is about the same size as our largest frog (about 2inches). And she put it in there, too. They seem to be fine together, the frogs stay at the top and the toad burrows in the bottom. I figure they live together out side, why not inside. Any thoughts??

[MatthewM1]

They would avoid each other in nature, not really an option in a tank. I wouldn't be surprised if somewhere down the line the toad tried to eat one of the smaller tree frogs when it's near the floor of the tank hunting. Also toads can release a toxin when stressed that would have awful effects if not kill one of the tree frogs if it can in contact with it.

I would move the toad before an accident happens.

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