Powers like Fallout and Vengeance can only be used on players. That should really be part of the in-game text.
The short answer is no. They do leave a corpse after they die but it fades as in any other npc. This is okey though as the pet power recharges very fast. All you can do to affect them in any way is to dismiss them - which comes in handy if they get stuck at lift doors, rocks or any other protuberance that they bump into.
There is always a lot to be thankful for, if you take the time to look. For example, I'm sitting here thinking how nice it is that wrinkles don't hurt. ~Author Unknown
Awhile back, I read that the light/dark faerie pets left a corpse that you could still target. Is this still the case? And if so, can you use "dead team member" powers on them (like fallout and perhaps vengence)? Thanks!
- Feint
7+ year vet with too many alts to list...