Which feed is best for a mix of chicks and layers?

[MarketGardener]

Won’t blocking thiamine effect chickens ?

 

[rosemarythyme]

Won’t blocking thiamine effect chickens ?

If that's your concern using unmedicated starter is the solution.

 

[Chris2018]

Won’t blocking thiamine effect chickens ?

Yes, that's why it's best off feeding a mixed flock of chickens a non-medicated feed. Chickens are more susceptible to neuromuscular effects of thiamine (B1) deficiency than mammals and can have greater health issues.