pigeons in the comfrey

The expression “pigeons in the comfrey” (specifically the lack thereof) refers both, somewhat confusingly, to a person who is not quite here mentally (similar to cobweb head), or who is restlessly busy doing many things (similarly to have fingers in many pies)

* Since the accident, Donald has not been the same. He doesn't have a lot of pigeons left in his comfrey.
* Joe never has a lot of pigeons in the comfrey. I don't know how he keeps up with all those projects.