Southern by choice
Herd Master
I would look into some better minerals. Kelp is great but it is better as a supplement than as a daily mineral.
If you are feeding a lot of alfalfa and feeds high in calcium then you run into the issue of depleting zinc. As calcium at higher levels depletes zinc.
Copper is as you know really important. Cobalt is essential as well.
You may find this link very useful. You can look up your county and see your averages. Of course WHERE you get your hay from is also a factor- so look at those areas as well.
https://mrdata.usgs.gov/geochem/doc/averages/countydata.htm
If you are feeding a lot of alfalfa and feeds high in calcium then you run into the issue of depleting zinc. As calcium at higher levels depletes zinc.
Copper is as you know really important. Cobalt is essential as well.
You may find this link very useful. You can look up your county and see your averages. Of course WHERE you get your hay from is also a factor- so look at those areas as well.
https://mrdata.usgs.gov/geochem/doc/averages/countydata.htm