Word of Caution: by all means keep poison baits in pet/childproof bait stations.
We had a couple of bait stations in the laundry room, in addition to traps, but I'd also tossed a loose bait off into a corner that was blocked off from the pets. But, as my wife was clearing out the laundry room the other day, she moved stuff around, and our family dog slipped in and ate that loose block of bait (TomCat - bromethalin)... and we were probably 12hr or more out from when she ate it before wife realized what had happened. There is no effective antidote, and little to do, unless you catch the dog soon after ingestion and induce vomiting (1oz of hydrogen peroxide, orally, will usually do the trick). Fortunately , bromethalin is less toxic to dogs than to mice/rats, and even a full 1oz bait block (ours was partially eaten) is less than 1/25 the lethal dose for our 60lb dog.
I made the dog throw up, just in case, but she had nothing in her stomach. Gave her a big slug of an osmotic laxative in her food, to hopefully move any she hadn't already absorbed through faster. 2 days out and she seems perfectly normal. But... we won't be tossing out any more baits without them being in a station so the pets can't gain access.
Some of the 2nd & 3rd generation anticoagulant baits can have LONG-lasting effects, when consumed by pets... may require Vit K treatment for several weeks to keep them from bleeding out.
I've seen tissues from pups that at the cholecalciferol (Vit. D3) baits... stomach, kidneys, heart muscle all calcified.