Ok, so measure the amount needed per bird per pen and it does not matter how much egg. I would suppose that the more egg the less flavor of Safeguard. DW feeds a lot of scrambled eggs, all the birds love them. Babies get the yolks and the peas get the whites.
Change of topic; do you think that one can feed too much egg yolk to young birds? Talking up to two weeks old. We feed the yolks to the new hatchlings for a couple of days and then start mixing it into the medicated starter for the first week or so. We have a lot of extra duck eggs for the birds to eat. You mentioned guinea eggs, we haven't found a guinea egg for two weeks, I think they stopped laying....
Eggs are very high in protein, which has been linked to leg problems in developing Pea chicks. Perosis or slipped tendon is usually not treatable and the chick ends up being culled, this has been linked to too much protein. I had some twisted tibias last year, which I attribute to overfeeding as opposed to high protein, but we did manage to correct it with 3 weeks of taping. Read up on peachick leg problems, I don't give my chicks any egg past the first week and then it is only given to promote interest in the starter.