Just wanted to give an update on Penny's progress:
We went to the vet for a check up on Thursday. One of the glands was empty, and the other had very little in it. However, the contents was dark and thick. When asked, the vet tech said the glands would have been full already if they weren't draining properly. So, Yay! no need to do a follow up visit.
I have been feeding her canned pumpkin and Glandex every evening with her dry kibble. She loves the Glandex; it's got dried liver in it.
I'm getting ready to order more. I think I will give them a glowing review.