Frog fight!

[Geoff]

I fed them last night and Fred pushed Barney out of the way to get to the food! Okay, typical ADF behavior I thought. Tonight as I was watching them though, Fred and Barney seemed to be having a bit of a dominance fight. They were both butting each other's heads and clawing at each other. Then, Fred grabbed onto Barneys upper half, flipped him upside down and held him that way!! Barney managed to free himself. They then proceeded to fight and sing at each other, I'm assuming they were determining who is the louder bigger better frog, Barney is younger then Fred, but not small enough to to fit inside Fred. Should I be worried about this? Is there anything I should be doing?

Although the behaviour you've described appears to be aggressive it's highly unlikely to be so. These frogs respond to the stimuli of movement at feeding time and will lunge at anything in close proximity that moves. Also, males in breeding condition will attempt to clasp any frog that comes near, whatever sex it is, and by whatever means it can. There's little you can do about it apart from separating them or simply remaining vigilant. Below are a couple of photographs illustrating the seemingly bizarre behaviour of males in breeding condition.