I would be real careful with the poison. Rats make what they call cashes. They take food and hide it for later. Anything with a heartbeat will die from the poison. The bait is real nasty stuff, the base is corn so your chickens may like it too.
I own my own pest control company in SC. I would suggest that if you know were the burrows are getting some tracking powder and dusting the entrances. (You may need a professional to treat the borrows.) The best and easyest way would be to put snap traps all around the area were you see the borrows. Put the trapes up against a surface with the bussiness end towards the wall.
You then need to remove all other food sorces that you don't need out. You need to make them hungery. Rats do not travel so the rats you see are your rats they will not leave. Good luck Brad
I own my own pest control company in SC. I would suggest that if you know were the burrows are getting some tracking powder and dusting the entrances. (You may need a professional to treat the borrows.) The best and easyest way would be to put snap traps all around the area were you see the borrows. Put the trapes up against a surface with the bussiness end towards the wall.
You then need to remove all other food sorces that you don't need out. You need to make them hungery. Rats do not travel so the rats you see are your rats they will not leave. Good luck Brad