My girls both go to daycare every day during the week while we are at work. When it was just Rory, she had really bad separation anxiety, which is what started it all. It is now probably her favorite place on earth - she literally cries out in delight as we make the turn off the main road and approach. Lane, who was rescued in a puppymill bust, started daycare after we only had her for a week or two (returned to work from Christmas vacation). They were so good with her, and she really loves it there now too!
You can see the joy on their faces (taken a few weeks ago at daycare):
If anything, it actually HELPED with potty training! Rory was pad trained and after attending daycare would finally use the bathroom during a walk. After a few weeks of daycare we noticed Lane would do the same on a walk!
Katy will do fabulously at daycare! You've checked it out, so you know she'll be safe there. I'll bet she has a blast socializing with all the other dogs, and she'll come home ready for a nice nap.
Good luck!