Where is rules on animals posted for the public to see. There isn't any. I broughty pet and was insulted even after I told associate it was service animal. Diabetic support dog.

Any time you take a service animal to a public place you should have support documents. It's usually posted on the doors but not sure it is there

Only if the animal has been trained and has all their shots and support id. If no id it's not considered a support animal

Support animals have to be admitted. You should report the incident to the store's management.