Cavvekan (CR 1/2)

Small Magical Beast
Alignment: Usually neutral
Initiative: +3 (Dex); Senses: blindsight, scent, nearsighted, light blindness, Listen +8, and Spot +4

AC: 15 (+1 size, +3 Dex, +1 natural), touch 14, flat-footed 12
Hit Dice: 1d10+2 (7 hp)
Fort +4, Ref +5, Will +1
Speed: 50 ft.
Space: 5 ft./5 ft.
Base Attack +1; Grapple -8
Attack: Bite +5 melee
Full Attack: Bite +5 melee
Damage: Bite 1d4+1
Special Attacks/Actions: -
Abilities: Str 13, Dex 17, Con 15, Int 2, Wis 12, Cha 6
Special Qualities:
Feats: Alertness; Track; Weapon Finesse (bite)
Skills: Listen +8, Move Silently +8, Spot +4, and Survival +2*
Advancement: -
Climate/Terrain: Any underground
Organization: Solitary or pack (2-18)
Treasure/Possessions: None

Source: Races of Faerûn

Blindsight (Ex): Cavvekans can "see" by emitting high-frequency sounds, inaudible to most other creatures, that allow them to locate objects and creatures within 120 feet. A silence spell or effect that causes deafness negates this and forces a cavvekan to rely on its weak vision.

Nearsighted (Ex): Cavvekans are very nearsighted, and their vision, low-light vision, and darkvision only extend to 10 feet. This limits their Search and Spot checks to a maximum range of 10 feet if their blindsight ability is negated.

Light Blindness (Ex): Abrupt exposure to bright light (such as sunlight or a daylight spell) blinds cavvekans for 1 round. In addition; they take a -1 penalty on all attack rolls, saves, and checks while operating in bright light.

Scent: Detect opponents within 30 feet. Exact location is not revealed, unless within 5 feet. Track by scent.

Skills: Cavedogs receive a +4 racial bonus on Move Silently checks. Cavvekans receive a +4 racial bonus on Listen checks, but this bonus is lost if their blindsight is negated. Cavvekans receive a +8 racial bonus on Survival checks when tracking by scent.

In the wild, cavvekans are cautious scavengers, eating bats, insects, lizards, rats, fish, carrion, the leavings of other predators, and edible fungi. They will sometimes attack weakened or wounded creatures, and occasionally a pack will gang up on a Medium-size humanoid creature. They have intimate knowledge of each crevice, cranny, and bolthole in their home range, so they are very difficult to catch. If trained and raised, cavvekans attack on command, much like a normal dog.