If you go into the docks theres a complex where there's a lot of rooms with some Mandalorians, an ithorian, a guy named lootra and some others. There's going to be two thugs that whenever you go near them they say "you think you could sneak up on us".
If you activate stealth you'll be able to hear that you can put the hounds to sleep if you pour some juma juice which you can get at the cantina.
But in order to pour the juma juice vogga(the hutt) must be asleep. in order to put him to sleep you have to go to the cantina and use stealth to listen to another couple of people who happen to mention that vogga would tire out and fall asleep watching a dancer. now you have to find a dancer for vogga to watch. i dont know where to find the dancer becuase i didnt need to put vogga to sleep. hope that helps