It`s really hard to get to Chins. In fact, it is nearly impossible to get that skill started, i.e., the mental preparation necessary. I`ve never leveled it past 30, but good luck.
If you haven't done the museum identification thing minigame, go to the basement in the museum in Varrock and talk to the... Err... I can't really remember, but it's pretty straight forward once you get there. The mini-game gives you 1000 Hunter exp.
They are cracking down on red chinchompa hunters, at least. I have 99 Hunter (and got it legitimately by the way,) so if you need any help, feel free to ask me.
The only reason I got it to 99 because I thought it would be a fast 99 with a good payout at the end. But that was back when chinchompas were a hell of a lot more than they are now (err... were a week ago. >_>)