Chicken has a wart

[ch1ckadee33]

I just noticed today that one of my chickens has a wart on her foot. I haven't had chickens for a long time so I don't know if this is normal. I also noticed her rolling around in soil which also seemed unusual so would this have something to do with it? Is this wart a problem?

 

[sourland]

The 'rolling around in soil' is dust bathing and is a normal chicken activity. The picture of the growth is not showing.