How does DD know what Petunia/Vernon said?

[esmith222002]

No: HPFGUIDX 156693

Having just been enjoying the discussion on Petunia and thinking 
about 'Remember my last', I was reminded of a problem I had with the 
entire scene. It has probably been discussed previously, and if so 
please direct me in the right direction;

How does DD know that Petunia/Vernon is about to throw Harry out of 
the house?

I am sure that if Petunia actually chose to evict Harry from her 
house then this would negate Harry's protection. This is why DD sends 
the message to Petunia - who clearly is not going to let that happen.

If we consider the Ministry owls, they arrive sometime after Harry's 
clash with the dementor's. He has managed to bump into Mrs. Figg and 
get back to Privet Drive before they arrive. Surrey is not that far 
from London, so it is perfectly reasonable that the MOM dispatched 
the owls on finding out about Harry's patronus charm, which then 
arrived at Little Whinging some minutes after that. Arthur Weasley's 
owl then arrives, following on from the MOM owl. Since he was at the 
ministry at the time, this also makes sense. It is at this point that 
we also learn that DD has just arrived at the ministry.

So how is it that DD knows what Vernon/Petunia have just said and 
then managed to produce an instantaneous Howler to prevent it. We 
have DD's comment that he has watched Harry more closely than he 
knows, but we know that DD is at the ministry, so I don't think 
the 'DD in animagus form' theory would work here. 

Fawkes? Patronus? Something else?

Brothergib