I had been using Tomcat brand bait blocks with limited success, the rats just didn’t seem to be all that enthused about the Tomcat bait blocks. And those are expensive at retail where you only get 16 oz. for about $16 plus tax. So I searched on feebay and found a much better deal - 144 ozs. for less than $30 shipped (double plus good when I can avoid going to the store).
https://m.ebay.com/itm/JT-Eaton-709P...sAAOSwiONYOyna
WOW! The rats LOVE this stuff! It’s touted as having peanut butter in it. I know it works ‘cause I find the occasional dead rat. At first I was replenishing at the rate of about ten blocks per day in a known heavily infested area but after about 7-10 days I haven’t needed to replenish for that storage area. I even saw one near death (it was unconcerned I was four feet from it making noise in plain sight that’s how hosed it was) STILL feeding on the bait block. I recently discovered evidence of rats at home so I started putting out the bait blocks - tonight they took NINE bait blocks out of ONE location! (so far at least)
If you have a rodent problem I highly recommend this J.T. Eaton product.