The two amphibians are conjoined, un-identical twins. [...] The two toads are stacked on top of each other. The one on the bottom is larger and darker. The larger toad appears to be normal, except for the second toad attached to its back. The toad on top is smaller and a lighter color. Its front legs have grown into the back of the larger frog, and it appears the bottom jaw may be connected to the larger toad's head.
"I don't know how it eats," Amy Dicken, Casey's mother said.
Girl finds two-headed toad in Hopkinton