We make up two five gallon buckets at a time so we do not mix the dewormer in the water or the buckets until it has been portioned out in a smaller bucket. We feed the mash for a day or two to get the birds used to it if they had not had it lately. We do a big scoop spoonful of mash for two birds, put that in the smaller bucket. For a group of mature birds, count all the cocks and hens, each hen gets two and every cock gets three ml of either SG or Valbazen mixed into an amount of mash you guess they will eat in an hour or so. That also gives the birds down the pecking order a chance to eat.