It depends on the nature of the pidgeot and the berries you are using.
I'm trying to make high-level poffins out of chilan berries, but they always come out lower than my wiki berries. I find that very odd.
I don't think poffins are tradable. If they were, I would have more by now.
Poffin LVs are determined by two things:
-How fast you stirred
-How many mistakes you made.
For best results, stir fast all the time while being careful not to spill any. If you get a time of 37 seconds or lower(and make no mistakes),you'll get the best possible poffin. Ive gotten LV 30 dry poffins using a Pamtre berry.