remove alpha channels

I discovered a new problem in Topaz when several in a selection only showed silhouettes.  I went and opened in Adobe and they were only showing the alpha channel.  Apparenly I had used years ago when wanted to change the background.  I dragged the alpha channel to the garbage and resaved with -1 added after the name.  I created an action and recorded deleting the alpha channel, saving to the file name with -1 added (in case I might want the original) and then closing.  However I found no new files, as it used the name of the example used, with -1 added and saved them all with the same name, overwriting each time.  If I hadn't used the -1 they would have saved with their own name, but then I wouldn't have the original.  

So Zenfolio uncovered some with alpha channels, but I didn't run a lot through that before uploading to my site and then I found 7 more such silhouettes.  This took about an hour of extra work to write down their ID numbers, find among hundreds in a folder, and individually, then resave without the alpha channel,  upload again, move to the postion of the silhouette (specific order desired) and delete the latter.

The next folder had a couple more with alpha channels.  Is there no way to know from Bridge if images have alpha channels, without opening and looking?  Some way to show what Topaz and Zenfolio are going to see?