Thanks for the quick reply, I made the change and it works. :)
But, now I'm confused. Because I created the treatRS (recordset) on this page with a parameter passed from another page.
<form action="Delete_Treat_Item.php" method="post">
<input type="hidden" id="treatid" name="treatid" value="<?php echo $row_treatRS['TreatId']; ?>" />
<input type="image" hspace="5px" vspace="0px" border="0" align="top" src="../../img/s_delete.png" alt="delete treat" id="delete treat" />
The recordset seemed to output the correct information on the next page, but I don't understand why it didn't for the delete action. I'm guessing when I load the page up, it loads the recordset correctly, but on submit (new post) it was empty? I may have answered my own question.