I always wondered what my dog would do if he approached an iguana? He is a ratter breed and caught a chipmuck but I did not have my camera readily available. This is a video on you tube that showed me the possibility of an encounter wilth an iguana. https://m.youtube.com/watch?v=vpZInQ8vGRI

To me, I would not have let my dog do that. Regardless of breed, it is not good to let a dog attempt to injure another animal. Which I'm not sure if the dog was trying to kill it, or just playing with it, but iguanas have very sharp teeth, as far as I know, and could have also injured the dog. The end was kind of funny though.

My dog would not be inclined to attack any other animal. She is spoilt rotten to the extent ants, flies even the neighbors' cats attack my girl.
She is scared of kids especially toddlers. I don't understand why.
You sure do have a brave dog.