Badly badly injured Bullfrog

[yug0]

Yessss, nightcrawlers! They are MUCH easier to handle. Around his injury, a strange color has formed...is it regenerating, or decaying? I cannot really tell.
Here's a picture:

[Pluke]

Yeesh, that doesn't look very good. Looks like decay but I could be wrong.. Hopefully I'm wrong.

[IrishRonin]

Thanks for helping out this beautiful creature first off. I know force feeding is hard but your keeping him alive. On the newly developed color, does it smell (the wound)? Decay and infections usually smell either funky or sweet.