A frog nicknamed “Leggy” displays 5 extra legs, yes, nine total. While locals are concerned that this is the result of toxic chemicals from a former landfill, think of the possibilities! Breed these critters en masse, then trim off the extra five for food industry processing, and return Mr. Froggy to normalcy. I’d bet PETA will still gripe. 
After a few years, they may grow a foot!
I confess to being initially confused by the thread title. “Multi-legged frog? Aren’t most frogs multi-legged at some point in their life cycle?” But having seen the picture, I concede: there’s multi-legged, and then there’s Multi-Legged! (Nonapedal?)
Is it still okay to make anti-evolution jokes at Kansas’ expense? Because this seems like a golden opportunity. “A plague of evolving frogs! God save us from the wrath of Darwin!”
These kinds of deformities are pretty widespread among frogs. It has recently been discovered by infection by a parasitic flatworm:
Is this the same situation with the deformed frogs caused by a parasite that get eaten by a bird, then the parasite reproduces in the bird’s intestine, then the bird poops into the swamp and the parasites infect tadpoles and the frogs develop with extra legs and are deformed and easy pickings for the birds and so on and so on…?