I have a feeling I know the answer to this one, but will ask the experts here anyway just to be sure :-)

If there are no AVNSC classes but only an AV class scheduled for the group, am I right in thinking that Best AV Gundog doesn't count?

No it's got to be a BOB or equivalent (which would be AVNSC).

Thanks Brainless, so I thought...ah well, 1 more point needed :-)