UPDATE:
Unfortunately our dear Bagel (the beagle) went to her heavenly reward yesterday. On Wednesday night after midnight, I got up (probably to go pee) and stepped in a pile of puke. I noticed Bagel standing at the door to the room where the outer doggy door is located. She wasn't making a sound.
It was a rough night and honestly, I thought she would pass on overnight while we comforted her. But she held on until late yesterday afternoon when we ended up taking her to the vet where she was euthanized.
Up until Wed when we went to bed she was as active and normal as she has always been. I'm guessing that the cancer turned a switch late that night and she took a drastic turn. Yesterday, she barely moved and didn't eat. Just sat there looking at us knowing that the end was near.
Thank you all for chiming in on this thread and the kind thoughts.