They are not familiar with my routine. My cherry shrimp and amanos take food right from my tweezers just like that. It's weird. They either are some kind of magical shrimp or they are just intelligent.
To feed my vamp I also target feed her. I crush flakes or other foods, take tank water to a small plastic container and then take my turkey baster and take the water with food and just feed my vamp whenever she fans the water.