Wow liquid manure,I hope its been composted properly or purified via fumigation.Well B 12 analouges of the inactive kind are found in plants and are the issue.Some can be converted but the many inactive will compete for receptor sites.A good methly group supplement is the way to go,most humans dont recycle enough to stay healthy.This includes meat eaters and everbody else.Stress is the biggest robber of health and well being.A mind at peace is more rejuvinating than any food on the planet.Omega 3 long chain fatty acids are important as well.I hope those eggs come from chickens that have free range of pasture.I hope things get better for you and yours.may you be blessed with vibrant health and peace beyond understanding.Jeff.