We dont face any special barrier regarding importing dairy products from Australia, the only thing is that importing procedure for dairy product in general is just longer than other products at sometime we have to wait for the Veterinary office to take samples for testing and it takes around 3 days to get the results before we can release the cargo.

As I am not an importer, I haven't had this experience myself. however I've heard of documentation related issues when importer bring dairy product from Australia. this may be related to health certificate or other document.
the department of Agriculture at post will also provide support for this type of issue.

Have you experienced any barriers at the port of entry when importing dairy products from Australia?

We do not face any barriers regarding the import of dairy products from Australia, due to intensive communication and good support from the suppliers for all documents issues related to product release from the port.
Barriers usually arise for product samples sent by air freight related to the time to process the documents, for example certificate of analysis and free Heavy metal test from third party laboratory related to health certificates and other documents , whereas storage in airport warehouses is not appropriate.
For shipments by sea freight there is no issue.

this have happened on several occasions but nonetheless we have complied to some of the documentations.

We did not experience any problem importing dairy products from Australia given the clear specifications with our suppliers. The problem we encounter during distribution is more on the shipping itself. We often face longer leadtimes due to delay in the transhipnent port.