I totally agree we over medicate both children and Annimals in this country. But before these medications they would die. It may only be a handful that die but if it was your kid or annimal that would be unacceptable.
I'm feeding my 4 pullets medicated starter til he recommended 18 weeks per Purinas Start n Grow directions. I can't afford to loose even one. Then I'll switch to Purina Layena .
That is perfectly fine.
