Both Darth_Wrath and myself statted the Tuk'ata Sith Hound before they were officially statted in the JATM (pg. 147), but here are those versions for those who like alternative stats.
EDIT: Prom kindly PM'ed me some descriptive text for this creature which I have now included below.

Description
A large dark muscular four legged animal with a pair of insect like arms attached to the shoulders. Spikes and horns protrude from the dogs head, which growls with razor sharp teeth. The Hounds eyes glow red and it moves threateningly forward.
Knowledge (Life Sciences)
DC 10 A large odd looking Hound or Dog.
DC 15 The Tuk'ata, or Sith hounds are force-sensitive and guard the tombs of the Dark Lords of the Sith on Korriban for thousands of years. It was not uncommon for a Sith hound to be sealed inside the tombs themselves. A few believe that they were immortal or drew nourishment from the Force to survive. More likely they survived by feeding on small creatures that infested the tombs as sections worn away by time created new openings in the stone walls. The Sith Hound has darkvision.
DC 20 They are fearless guardians and will kill anything that enters a tomb. The Tuk'ata are at least semi-sentient, and speak the Sith language. Smaller groups of them can still be found on other planets with a strong link to the Dark Side.
DC 25 The pair of thin, insect like arms sprouting from atop their shoulders are generally considered to be vestigial wings and are tipped with poisonous stingers. The poison acts on contact, numbing any flesh it touches. When injected into a being's body, the poison shuts down muscles and other vital systems, including the heart and lungs, leading to a swift and painful death.
Tuk'ata (Sith Hound) CL4 (Darth_Wrath's version)
Medium Beast 5
Init +15; Senses: Perception +3
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Defences Ref 13 (Flat-footed 10), Fort 11, Will 11
HP 35; Threshold 11
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Speed 6 squares
Melee 2 Claws +5 each (1d4+4) and
Melee Bite +5 (1d6+4)
Fighting Space 1 square; Reach 1 square
Base Atk +3; Grp + 6
Atk Options: Cleave, Power Attack
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Abilities Str 14, Dex 16, Con 12, Int 9, Wis 12, Cha 12
Feats: Cleave, Power Attack, Skill Focus (Initiative, Survival)
Skills: Initiative +15, Perception +3, Survival +13
Tuk'ata (Sith Hound) CL4 (Darth_Scorpion's version)
Medium Beast 5
Init +10; Senses: Darkvision; Perception +8
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Defences Ref 13 (Flat-footed 10), Fort 11, Will 11
HP 35; Threshold 11
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Speed 6 squares
Melee 2 Claws +6 each (1d4+5) and
Melee Bite +6 (1d6+5)
Fighting Space 1 square; Reach 1 square
Base Atk +3; Grp + 6
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Abilities Str 16, Dex 16, Con 12, Int 6, Wis 12, Cha 12
Special Qualities: Darkvision
Feats: Skill Training (Perception), Skill Training (Survival)
Skills: Initiative +10, Perception +8, Survival +8