Where can i buy some rat/mice poison in toronto?

I have a rat/mice in my ceiling that is driving me crazy. I wanted to know where can i buy some poison to feed the rat and get rid of it once and for all. I live in Scarborough,Ontario but i can drive to anywhere in Toronto.Where can i buy some rat/mice poison in toronto?
I have seen a dying mouse and it is awful. PLease use a humaine trap that wont harm them. Like a box that traps them but dosent like Squish them, they are ust like cant get out. PLEASE!? It is also coz i have two rats and two other of my rats died :( please use a humane trapWhere can i buy some rat/mice poison in toronto?
Here is a link on how to build your own humane mouse trap(s):


http://mousetrap.droehnland.net/





Here is another one. Don't be fooled by the ';treehugger'; in the URL, give it a chance:


http://www.treehugger.com/files/2007/09/鈥?/a>





Keep in mind you can potentially save money while using up some clutter around the house when building these mouse traps!





last one:


http://www.humanemousetrap.info/
try the local hardware store.