Tigers in chains in Thailand

I visited Thailand recently. When I went to see Nongnooch village near Pattaya, I was shocked to see a chained tiger. The tiger was indifferent to human presence and appeared drugged. The only time the tiger showed some alertness was when a milk bottle was brought near him which he suckled like a hungry baby. The attendant charged 50 Bahts for stroking the tiger and getting oneself photographed alongside the tiger. I find this commercialisation of the tiger which should be in the wild is outrageous. Wonder if there are any Wildlife NGOs in Thailand that protest such treatment meted out to the majestic cats.