Two aspects spring to mind with regards to a species' odour: camoflage and chemical-social signaling.
Going with the look of their reptilian skin; has anybody stuck their nose on a reptile? They don't really smell (unless they're furious and flinging something foul, or they've been sat in their own waste). For the purposes of both hunting and evading predators, it serves them to smell of their environment.
The case for any kind of odour strong enough for humans to detect, with our rubbish olfactory senses, would be social signalling. If they can't control this consciously, it wouldn't serve them well whilst hunting.
However, playing with rotting meat will absolutely ensure you're detected from a mile away. They do spend time dressing and polishing the kills they want to keep, which would take care of the rotting smell aspect.
Given that they're supposed to be an intelligent species, I would be disappointed if they hadn't thought of these issues.