update

The oncologist called us back, and recommended that we take Dave to the vet on Saturday, as long as he didn't get worse through the night. When I called to make the appointment, I found out that they had late hours, so we were able to get him in. The vet we saw wasn't our usual regular vet. Dave's exam was good - his temperature, heart and stomach sounded/felt good. He said a few interesting things: that his lymph nodes were big, but that he'd felt worse, that he heard lung noises, which could be anything from excitement to an infection/pneumonia.

The good news? He thought that Dave hurt his shoulder. Upon examination, his front right leg was concerning.

I'll follow up with oncologists on Monday, and hope that it's a random leg injury in the meantime.