/jp/ - Otaku Culture

In elona+, do the "pet material gathering skills" on pets stack?
Say, if i give gardening to a pet, will it gather only herb materials or any kind of material once it kills something? If it's the latter, does it stack in terms of quantity if i also gave such pet Gene Engineering and all the other pet gathering skills?
Also do pets gain materials from any kill? Or just from similiar level kills? Or only after tot xp has been earned? Or is it just random chance per kill? And i guess only the pet dealing the killing blow will get them, right?

Sorry for the tons of questions, it'd be useful to know before i spend time searching for all the required skills.