Presently have six Greenwing Macaw (17 yo), Red Fronted Macaw (12 yo), Red Lored Amazon (17 y.o.), Lilac Crowned Amazon (about 43 y.o.) and a Congo African Grey (11 y.o.)
Panama Amazon (1 Y.O.)
The only packaged krill I've ever seen is fish food, but krill is a type of crustacean & its shell pieces could cause a problem in a bird's digestive system.....peeled shrimp would be fine...either fresh or cooked.....