The principle on which the whole standard rests, in two halves that must both hold. A dog friendly workplace welcomes dogs and provides properly for them, and it does so without forcing any colleague into proximity with a dog against a genuine medical, allergic, phobic or comparable need.
Welcoming the dog is not enough on its own, and neither is protecting the people who opt out. Both are required. A workplace that achieves one by sacrificing the other is not dog friendly under this standard.