I agree, if I saw someone on the pets section of craigslist giving away a "senior rabbit" I would bet it was a few years old. If someone was selling senior rabbits in the farm section of craigslist, I would assume they were older than 6-9 months. It would definitely depend on the speaker.I have to ask... was the person offering the rabbit conversant with rabbit breeding and showing terms? Because if not, among the general populace, "senior rabbit" could mean "senior citizen rabbit."
Make that 8+ months for "senior" in the large to giant breeds.Well, if going by the ARBA show rules, it depends on the breed of rabbit... Larger breeds, like New Zealands, Californians, and including the giant breeds, are "intermediate" (or 6/8) at 6 to 8 months, and "seniors" at 9 months of age.