Edmundis can be seen being questioned by Fist Patrick about missing redcaps, but does not consider the missing redcaps to be a concern. Patrick asks why they were being caged and how many are missing but Edmundis is evasive or defensive in his answers.
Judging by the fact that Edmundis can recall 6 missing redcaps only after Auntie Ethel is killed for good, the missing redcaps were likely taken by her.