Surgery to remove the chordoma is very simple. The ferret will feel much happier and healthier once it is removed. I would not recommend letting it get any bigger than it has because the ferret's health will decline. To compare: if you have a bowling ball weighing you down, wouldn't you want to get rid of it? I am not a vet. I volunteer weekly at the local GCFA ferret shelter and I have seen a few bad ones. They all survive and live happier lives after surgery. -- Robin Pikscher [Posted in FML 7315]