If you are a parent, then you know kids will sometimes bring home a new pet. But when a little boy brought a 9-legged frog home to Kansas, some adults got worried.

The 9-legged frog is raising concerns about a former landfill.

Looking from above, the frog may seem normal. But with a closer look, it's clear there is a problem.

The kids have named him "Leggy". Little Trevan found the frog in the pool in his back yard Monday afternoon. But that's not where Trevan's parents and their neighbors think it came from.

They think it may have come from a nearby pond and drainage ditch. Neighbors say they've heard the area used to be a landfill, which is why the frog is causing some concern.

"Somebody needs to look into it, if it is not safe for kids," said neighbor Cassy Kellogg.

"Kids go back in this area all the time because there is a pond back there and if they are playing in it, what's going to happen to them?"

"These things can happen spontaneously through natural mutation," explained Wichita State biologist Dr. Jeffery May.

"Or they can show up as a result of some environmental factor. If there are environmental causes, then chances are you will see more of these things."

This isn't the first time we've seen abnormal frogs.

In fact, 35 states have reported abnormalities since 1996.

The problem has been finding a cause.

"A short term exposure at the right time can have an impact later on," May said.

"This is the problem with detecting these types of things, is the exposure may be way down in the developmental period but you may not see manifest outcomes until much later."

In East Wichita, Kellogg wants some answers to make sure her kids are safe.

"Hopefully someone will come out here and do some tests and make sure the water is safe and everything is okay," Kellogg said.

For now, all she can do is keep an eye out for more mutated frogs.

Wichita's Environmental Services Director Kay Johnson said her office will look into the issue later this week.