When I went fishing this morning, the lake was full of dead shad floating around,  any idea what is going on?

I have heard of this, It is usually caused by high temperatures,and a lack of current. These two things combine together to reduce the amount of oxygen in the water. This is called fish kill.

( BASSIN' Feb. '08 )

                        -searoach

Shad sometimes die off in large numbers after spawning.  It's rather common.   Usually nothing to worry about, just the natural cycle of life.

I saw this in a small pond here, I was told by a guy that lived there that he sees this every year after the ice thaws.  I was wondering why only the shad, the bass were healty, crappie were too.

Thanks Micro.  That is what I thought I'd heard before but wasn't positive.