To say that I'm sad about this seems unfair to Five as he doesn't know what is happening.
As I noted we went to a vet yesterday to see why Five was loosing so much weight so suddenly. Initially it was though that he had more room to run around in and that he wasn't eating as much so a little weight loss was expected. After a little time the weight loss didn't stop and became an issue.
The vet felt around and noticed something odd about his kidneys which needed a specialist to look into. An appointment was made today for 12:00 which I arrived at 11:45 for.
Initial view from the specialist's assistant was that the kidneys were definitely enlarged and needed to have a closer look. The specialist came in and commented that the best go would be an ultrasound to see what was wrong and a quick "thin needle biopsy" to see what was going on. Luckily the all the resources were available and they could get it all done in 20 minutes.
When they came back they said that Five's kidneys were between two and three times the size they should be, should be 3.2cm were 9.0cm. This was being caused by cancer that had developed. They weren't sure how serious it is but a new specialist would be showing up on Saturday to take a look at the results and get a better idea of what can be done for Five.
Right now the given options were a) steroids which would delay the inevitable or b) chemotherapy which would delay the inevitable or even possible remission. They didn't say it but the chance that Five will see Baby E's first birthday is close to zero.
So right now I'm sad that I'll be loosing a friend but also sad because that friend will never know why this is happening.