Such cats can become a real problem if their rigid daily routine is upset - say by the death of an elderly owner.
All those rigid routines you keep to, they're to tell you you're all right, on track.
I dreaded going back to the rigid routine of the university.
He felt a mixture of astonishment at himself and irritation that his rigid daily routine was going to be broken after forty undisturbed years.
She held a rigid routine, awaking early in the morning in order to write before she left to teach.
The result was a rigid routine that seemed more martial than elegant.
The days became depressing and marked by rigid routine.
His parents, however, try to pin him to a rigid routine.
He has friends, food, clothes, indoor plumbing and a rigid daily routine that he welcomes.
He cannot maintain eye contact, talk normally or interact with others, and he depends on rigid routines for a sense of security.