I'll respond to my best guess and based on my own history.
All of the pins/screws will remain permanently in place as they are strategically placed to maintain the permanent fusion. The only time any of them would be removed is if they were to 'come loose' in some way.
My dog was hit by a car, had surgery with screws in his hip and we had to watch during the healing process for the feeling of the screws to see if they'd start to not feel as flat along the bone.
My neck has screws and a titanium rod and the neuro watched that as I was healing.
Both dog and I still have all of our hardware.
I know his life is by far the much more important concern, but I was just wondering if he does survive the next months, would he eventually be able to move around a pasture with some normal gait?
Many prayers for Barbero.
Acck! Being where you are, you're lucky you didn't have this guy for a surgeon - remember the doc who used a screwdriver shaft?:
http://209.157.64.201/focus/f-news/1596529/posts?page=1#1
http://209.157.64.201/focus/f-news/1596529/posts?page=32#32