Wait... is Inez H/A/F? Is Terry H/A/M?
Is Terry a service dog?
I was wondering how long it would take someone to ask this...Oops, forgot this is OAATP... Ignore my previous post, here's a WAG:
Terry is Inez' service / medical alert dog and detects that the stranger is about to have a seizure/go into hypoglycemia, alerts him, and
[the stranger] leaves to take his meds / seek medical attention / lie down?
Got it!
****SPOILER****
Inez has diabetes; Terry is her medical alert dog. While at a restaurant, Terry detects that a just-entering stranger at the next table has diabetes and alerts him. Inez tells the stranger what Terry's interest means, so the stranger quickly steps outside to call his doctor.
Well done!