I've never claimed that plants and inanimate objects have souls. I have stated that our physical senses do not perceive all there is to God's Creation, and that the wonder of that Creation is much more than our ability to ever comprehend in the flesh.
As far as interpretations, you might want to look at Martin Luther, John Calvin, John Wesley and Matthew Henry, for starters.
This discussion was about whether dogs had souls and not whether creation itself worships its Creator in some mysterious way. At least for me, they are two different topics.