Dymphna wrote:
In areas where other animal might get it, here is a better solution.
Cat's don't eat dried potatoes, but they do. Put out a couple piles of
dried potatoes and let the rats eat them. Then when they drink water,
the spuds expand in the stomach and pop. Then when the other animals
you want around find the remains and it it, they don't die from the
poison.

I strongly suspect this is complete b*llocks.

Dried potatoes have been used in rat experiments (to look at the effect of
genetically modified potatoes). If feeding them dried potatoes killed the
rats, the experiment wouldn't have got off the ground.

http://cat.inist.fr/?aModele=afficheN&cpsidt=16726124

All you'd do is feed the rats.

Tim