The treat that was being sniffed by one of the bronze statues at the tram stop in Tuam St, near the intersection with High St, was noticed to be missing last Wednesday by people working nearby.
Christchurch City Council staff saw it wasn't there during a routine inspection.
'Corgis On High' is a set of three statues installed in High St in 2003 to mark Queen Elizabeth II's golden jubilee.
The late Queen owned more than 30 pembroke welsh corgis.
The third corgi in the line-up was depicted as sniffing an ice cream that had fallen on the ground.
The statues cost $8000 each.
City council head of parks Rupert Bool said it is working with Marshall to find a way forward.
One was stolen shortly after the earthquake on February 22 in 2011, resulting in the city council removing the others for safe-keeping.
In 2020, one of the corgis was painted blue by an anti-colonialism protester.
The paint was removed without any permanent damage.
