There is no such thing as a 'Humane' dairy, just like there is no such thing as 'humane' slaughter.
For a cow to produce milk she must have a calf every year, It is a common misconception that only male calves are waste products and females are always used as herd replacement but this is not true, both male and female calves are killed on the farm, sent to auctions and veal farms or sent directly to the slaughterhouse, some female calves are used as herd replacement but this is only a small percentage.
Barambah Organics claim that they don't kill there calves but send them to other farms, they don't state what type of farms these are though, it is simply unrealistic to think that every year hundreds of calves go to loving and caring homes. It is very expensive to raise a bobby calf, I've rescued and raised 6 bobby calves in the last 2 years that I've rescued from the local bobby calf auction ( 3 males and 3 females ) and it costs approx $165 every week to raise one calf let alone hundreds of them. The grim reality is the calves most likely go to farms where they are grown out for veal (females and small boned males) and the larger males are grown out and are purchased by beef producers and sent to feedlots where they are grown out for cheap beef and sold to fast food chains or there meat is sold to the overseas markets.
The best way to not contribute to the dairy industry is to not consume it or simply lower your dairy intake

maybe start off have a dairy free day and going from there

I'm in no way having a go at you I'm just saying the facts