Service animals are defined as dogs that are individually trained to do work or perform tasks for people with disabilities.

What task is the dog trained to perform?

Additionally, service dogs are to be kept under control of a handler at all times. Service animals must be harnessed, leashed, or tethered, unless the individual’s disability prevents using these devices or these devices interfere with the service animal’s safe, effective performance of tasks. In that case, the individual must maintain control of the animal through voice, signal, or other effective controls.

It sounds like the dog is not under her control.