We've had a postal consult with Richard Allport (my own vet had just done a blood test, checked Herbie's weight and manky teeth) and now I'm waiting for Herbie's meds to arrive. His nodes seem to be another notch bigger.
He's currently in disgrace for standing in some poo in the dark, then running upstairs. I've had to sponge poo-ey footprints off the stairs, the rug, his bed... fortunately by the time he reached my bed, his feet were dry. Small mercies.