New Zealand and some other dairy exporting countries are talking about  launching possible action against Canada for its restrictive trade practices.

The dairy industry here and its counterparts in the United States, Australia and Europe are upset at Canadian measures designed to restrict imports and protect its own dairy farmers from competition.

They want  their governments to put pressure on Canada to remove its trade barriers or lodge a complaint to the World trade Organisation if it won't oblige.

Dairy Company Association Executive director Simon Tucker says Canada already has some of the highest tariffs in the world on dairy imports and is looking at indirect subsidies as well.