I want to say that an individual has a chip on their shoulder, but a month ago, they did not.

• Did they "raise a chip on their shoulder", as might be inferred from the first cited history of the custom in Wikipedia?
• Did they "place a chip on their shoulder" as might be inferred from the North American fighting custom (Ibid.)?
• Did they grow a chip on their shoulder?

What verb can I use to explain the change?