A few ideas/proposals/options:
* Not being actual mammals (rather an alien species), slavers are hatched from eggs and do not nurse their young.
* In the wild, slavers commonly live in small groups, but normally hunt alone or in pairs.
* Slavers are equally enthusiastic about wide-open spaces and forested ones. In a forested setting, they are essentially arboreal, using their jumping ability to move freely from tree to tree. (Imagine the world's deadliest squirrel.) On flat ground, they use speed and stealth to approach swiftly and silently, then spring at full speed.
* Though sharp, slaver claws are used for traction and grip, not for attack. They move with their claws; they kill with their teeth.
* Given time, slaver hounds' jaws and teeth are strong enough to chew through steel bars.
* Level of intelligence is similar to a smart canine (e.g., German shepherd), but more focused on spatial reasoning and navigation.
* Personality tends towards extreme loyalty to a few individuals, relative equanimity to other slavers, and malign indifference towards everybody and everything else. There's also a category for immediate threats and prey, which go straight to the top of the slaver's "to do" list.
* They do NOT get along with Terran canines. Dogs tend to recognize the slaver's profile as dog-like, but everything about it is wrong-- shape, smell, social mannerisms, everything. Slavers tend to look at dogs with that same malign indifference they show to most living things-- until the dog reacts in an aggressive or defensive manner, which shifts the dog into the "threat/prey" category.
* Slaver pups are self-sufficient from birth, and almost entirely arboreal. For this reason, slaver egg clutches are usually laid in or immediately adjacent to wooded areas. At this stage, they are social but independent. Nearby pups of similar age will tend to form strong attachments to each other over time, and will form one another's social group ("pack" being the commonly-used misnomer) once they reach adulthood.
* Slavers do not mate for life. Typically, mates are selected from outside the social group, not within it. Likewise, slaver parents do not care for their young.
* The primary purpose of a social group is defense and survival oriented. Slavers are not territorial, but conflicts occur during times of scarcity, and other members of the social group will share their kills with a sick, injured, or simply less-successful group member.
* Further possibility: slavers are not (at least originally) the apex predator of their ecosystem. Social groups cooperatively watch for and warn each other of danger. They sleep in shifts.
* In addition to well-developed senses of sight and smell, slaver hearing extends well into the ultrasonic, which is also where most of their vocal range lies. They judge distances and navigate arboreal environments using limited sonar.
(Yes, I'm having way too much fun with this. Argument or agreement welcome.)