I have done that, it attacks the shrimp pieces a few times but doesn’t eat it and ignores it then the fish charges in and eats the shrimp. ?Try cut up shrimp into smaller pieces. I have to do that with mine sometimes as if too big it shakes its head holding the piece like a dog shaking its head til piece gets smaller and smaller it has to be so bright to grab the biggest for the other tankmates and ingore the smallest