n small beast 

Perception +9; darkvision

Languages Aklo (Can't Speak Any Language)

Skills Acrobatics +9 (+11 to Leap), Stealth +9

Str +3 Dex +4 Con +2 Int -3 Wis +2 Cha -2

AC  20; Fort +9, Ref +11, Will +7

HP 45

Speed 25 feet

Melee [>] jaws +11 (finesse), Damage 1d10+5 piercing plus Grab

Melee [>] claw +11 (agile, finesse), Damage 1d6+5 slashing

Kholaimairn [>] Requirements The chupacabra has a creature grabbed; Effect The chupacabra sucks blood from the grabbed creature. The chupacabra gains the quickened condition for 1 minute and can use the extra action only for Strike and Stride actions. A chupacabra can't use Kholaimairn again while it is quickened in this way. A creature that has its blood drained by a chupacabra is drained 1 until it receives healing (of any kind or amount).

Pounce [>] The chupacabra Strides and makes a Strike at the end of that movement. If the chupacabra began this action hidden, it remains hidden until after this ability's Strike.

Bestiary 2, page 52.