During molt, or any time hens aren't in production the combs will pale and shrivel.
I can't imagine any major feed manufacturer not including all the vitamins and minerals chickens are known to need in the proper ratios.
They proportion each nutrient individually.
The small outfits will use a vitamin and mineral pack. Then it depends on how they mix the ingredients.
Having worked in automated feed mills, I can see in some of the older mills how an ingredient portioner could get clogged and when called for it may not deliver. But that is extremely rare because the feeds are assayed regularly. If a nutrient is missing or low in the assay, they immediately fix the problem. It does their reputation and business no good if they don't deliver the goods.
Lots of vitamins and minerals are already in the main ingredient grains and legumes, just not in sufficient amounts so need to be supplemented.
I'm going to the feed store tomorrow and will look at the ingredient list on Nutrena's Feather Fixer but I can't imagine riboflavin is excluded unless there is sufficient amount in the primary ingredients.
Let me ask the OP this. Is there alfalfa meal in the feed? That is a good source of riboflavin and if the assay shows there is enough, it may not need to be added.
I can't imagine any major feed manufacturer not including all the vitamins and minerals chickens are known to need in the proper ratios.
They proportion each nutrient individually.
The small outfits will use a vitamin and mineral pack. Then it depends on how they mix the ingredients.
Having worked in automated feed mills, I can see in some of the older mills how an ingredient portioner could get clogged and when called for it may not deliver. But that is extremely rare because the feeds are assayed regularly. If a nutrient is missing or low in the assay, they immediately fix the problem. It does their reputation and business no good if they don't deliver the goods.
Lots of vitamins and minerals are already in the main ingredient grains and legumes, just not in sufficient amounts so need to be supplemented.
I'm going to the feed store tomorrow and will look at the ingredient list on Nutrena's Feather Fixer but I can't imagine riboflavin is excluded unless there is sufficient amount in the primary ingredients.
Let me ask the OP this. Is there alfalfa meal in the feed? That is a good source of riboflavin and if the assay shows there is enough, it may not need to be added.