That will depend on how strong your faith as a Muslim is.
As posted in the link, some muslims admitted that they will eat
pork in an emergency where they are in danger of dying from
starvation, so the same goes for a blind Muslim who is in need of a
guiding animal.
In the case where there is nth left to eat, they can eat the
pork la, less the starve to death.
In that case, pork or carcasses can be eaten for survival.