I put out seed for the birds

I think the birds are on to me.  
In my housecleaning I discovered a jar of seeds from who knows when, so I filled the seed dispenser and put it outside for the birds. They are ignoring it. I guess the seeds are too old.  
Two birds are sitting on my patio wall right now - with their backs to my seed dispenser - in distain.
Oh. Look!  
One of them just flew up to the seed sock and sampled it. Will s/he go spread the word about it? Will the report be good or will s/he tell everyone to not bother?
Oh the suspense.
(note to self -- buy new seed)