Yeah, I dont know why people get so paranoid about using Rat/Mouse poison.  I have 8 poison stations in my pens, have had for years.  From what I understand, poison (Warfarin and the like) is a humane way of killing rodents,  they just get tired and go to sleep.  Far more humane than throwing them in a bucket of water.   
I have found dead rodents all over the place over the years.  I have even seen roosters fighting over dead mice.
I have seen my dogs sniffing dead rats but never eat them, and as my dogs weigh over 80kg...or about...170lb each, I doubt very much that a small amount would hurt them if they did. 
I have NEVER seen anything die from using poison except rodents.......thats in probably about 6 yrs when I built the bait stations.
The thing is too.......make sure the rodents can not remove the poison from the bait station.
 
Cheers...........The Dog