Deborah,
I think under your scenario, chicken would be able to access its
subgroup's (bird's) archives, yes?
No, not if the bird subgroup has its archive access limited to bird members.
I would imagine this need comes up fairly often - how have other
people solved it? It's complicated, because it's an actual discussion
list, not just a notice distribution list, which means the posting
has to work both ways.
Presumably not both ways, that would mean everything posted to bird would be available to chicken.
I've heard of people using an email account to automatically forward messages from one group to another (using a filter in the email). One needs to be careful not to create a loop when doing this.
Shal