Don't remember blaming anyone,I'm sure I have bred many stupid pigeons in my time ,and surely untrained pigeons come under the heading of poorly trained,hope i have never sent a sickly pigeon but I bet I have,given that I race control our fed and speak to our driver weekly ,he tells me how in the first few weeks he regularly has to Chase birds out the lorry it seems safe to assume they lack training or health of brains of all three