I'm with sand man on this one.
If you fish the bottom off east beach on chappy I can guarantee you will catch as many dog fish as you could possibly want or not want.
I have noticed in recent years that they also take live eels. After many chewed up eels and missed hook sets I can generally feel the difference between a dog and a striper. I have caught stripers and dogs at the same place on different casts, so I don't think they affect one another tremedously.