The character of the seeing eye dog Pax was trained by well known animal action expert Karl Lewis Miller, was played by several white German Shepherds, named Blanco, Blizzard, and Snow or Snowflake. Pax won the The American Humane Association's Performing Animal Star of the Year (PATSY) Award in 1972.
The apartment set is a redressed version of the Brady Bunch house set. You can see through to the kitchen where the levered doors to the den are, the patio doors and chairs. The "apartment" entrance uses the landing steps that would normally go to the stairs going up to the second level of the Brady house.
Josephine Hutchinson played James Franciscus's mother on The Deputy Season 2 episode 5 Mother and son