3kg Trace Mix supplying optimal zinc
1.8kg Tuff Rock Poultice for lesions
Go Ahead shampoo for washing faces and ears.
4kg Flax for anti-inflammatory properties
 
Now is the time you start to see Facebook and Instagram ads showing magical, overnight solutions for Itch. The reality is that there is not one cure. You need to apply a suite of solutions, and you need to start well before January. With diligence though, even if you start today you can greatly diminish your horse's discomfort.
Queensland itch is a hypersensitivity reaction to the Culicoides midge bites. It typically manifests as intense itching, hair loss, and skin inflammation, particularly along the mane, tail, and around the face. Insect bites are the problem. You can greatly reduce the reaction to bites with nutrition and topical treatments, but limiting bites will make a big difference. Rug your horse, and apply insect repellent.
Research indicates the best nutraceuticals for Itch are linseed and zinc-based supplements. 
You can read more about that here.
Trace Mix supplies optimal zinc. It doesn't just help with Itch, but anything immune - skin problems, parasite management, and wound healing etc.
Linseed/Flax supplies omega 3 oils. It helps with Itch, but it's great for neurological function and is anti-inflammatory generally.
Topical treatments, such as Tuff Rock can provide immediate relief by soothing the affected areas and reducing inflammation.
 
All skin conditions are improved by keeping your horse relatively clean. A horse will scratch when they have loose hair, dirt, sweat and salt on their skin as well as from the insect bites.
 
Go Ahead is a zinc-based shampoo. It is human-grade, so it's safe to use around the ears and eyes. Faces often need a good wash if they have been wearing a fly mask 24/7. This shampoo is also good for treating greasy heel, rain-rot or any other skin problems.