Liquid Goat Wormer is Fenbendazole. Its used regularly on poultry, given orally. .2 ml per pound of bird, under the tongue, once a day for 3 to 4 days, repeat in 10 days to get any worms from hatched eggs.
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So sorry your bird has sour crop. Is the crop hard like a soft ball? (Impacted crop) or soft and squishy? (Sour crop) If soft...Make sure not to be feeding foods that feed yeast....bread, fruits, berries, etc... stick to protein foods only and chicken feed. A...