The phrase "dog guide" is a noun. The plural would be dog guides.
Here you go: http://pets.webmd.com/dogs/guide/dog-nutrition-for-a-healthy-coat Has lots of information that you might find helpful. Probably has what you're looking for.
Normally a guide dog would be a specially trained dog who would act as the eyes for a blind or partially sighted person. To 'guide' them safely in the outside world.
One can find tips on guide dog training on websites such as Web MD, Guide Dogs and Cesar's Way. Tips are also available on Guide Dogs QLD, Sourceforge and Boulder Puppies.
The term "K9" is typically used in reference to police or military dogs, not guide dogs.Added:Actually, the term "K9" comes from the Latin word for dog, canine. I think it would be fine if you referred to a guide dog as a K9. But it would sound a little redundant.
yes a vet would be very helpful
No.
That depends on the dog. Some would do nothing, some would protect the handler.
I think they would be Labradors.
For one, the dog and the handler are usually not apart when in public. Think about it for a minute----what use is a Guide dog for the handler if the dog is not with the handler? Most Guides will not leave their handler even if the leash and harness handle are dropped. That is their person, and they do not normally leave their side. The only time my wife's Guide is away from her in public is if the dog has to relieve and I am taking it out to do so or back in to where she is waiting.If something has happened to the guide dog handler, the dog may be searching for someone to help their handler. My own service dog is trained to do this.
Your local library is a great place for finding books about housebreaking your dog. If you would like to purchase a book you will find that Amazon has over 200 different books on the subject. You can even read the reviews about each one to find out which one would give the most helpful information for your situation.
If the person has cerebral palsy and or is aging they would not need a guide dog, guide dogs are for blind. They may need a service animal or service dog, and does it cost, usually yes but I can not answer how much with the information you provided.