Can another rescue take them in?
Is she successfully fostering, i.e., moving them to good homes regularly?
Why is a person who has pain on movement and is not mobile rescuing large breed dogs? That is strenuous pursuit for an able-bodied person.
You'll have to weigh the value of this friendship vs. your conscience to do what is right for the dogs. After all is said and done you may still salvage the friendship; the dogs may get adopted out or euthanized. Sympathy to you for your tough choices.
Liesl, b. 1/1/11