Some mystery help

Some mystery help

We've got a problem. We've had random dirt piles start showing up in my Mom's yard. They started this fall and have just kept up and keep spreading. The ground feels all sorts of spongy and it's caving in below your feet when it's walked on. We've asked our neighbors if they had any idea and most didn't, just suggesting that it was probably grubs and foxes were digging for them. Just a couple days ago though another neighbor came over and suggested that it could be moles and that'd explain the piles of dirt and the falling in could be the tunnels. Anyone have this happen to them?

Our cats sit and watch in amazement at the lawn for hours. Also since we have we have the cats and live right next to a lake using any poisons is not an option.

Is it moles? How did you get rid of them? They are spreading out quickly and need to be stopped. We also have a large yard so it could become a serious issue if not stopped very soon. We already couldn't rake over the worst section because it completely pulled up the grass.

Small section of the problem:


Closer up:



Help!
Zinnia Problem

Zinnia Problem

More guessing in the garden

More guessing in the garden

Roses

Roses

Gooseberries

Gooseberries

In the garden again!

In the garden again!

Ugh, help me!!

Ugh, help me!!