Yeah, that's the downside of silver dollars. They eat so much and fast that they're taking food away from the ATFs. I still think the Tin Foils are the best dithers for ATFs. Mine don't eat off the surface so it leaves it to the ATFs. But my SD's are really pigs. The only positive I see is that it makes the ATFs more aggressive towards the food if they want to eat before the SDs get it.