I,ve just had four Turkeys hatch today and some more Light Sussex.I hope i don't have any more casualties .
Cotswold, as regards your thoughts about Rats getting immune to poison i was chatting to a chap who sets poison in a factory i used to work in, He said it was a waste of time poisoning Rats where Poultry is concerned because the poultry food contains a natural antidote(Vitamin k)