Hello there,
In my research, some carriers place the guide dogs against the bulkhead in a bulkhead row. The rationale is that during the impact, the dog will be "restrained" by the bulkhead (i.e. thrown against). This recommendation is remarkably similar to the old recommendation for lap babies: wrap them up in a blanket and place them on the floor in a bulkhead row. (UGHH!)
During evacuation, the dog is to be led to the door, and pushed off the slide.