Internal Power/Strength (IS/IP) in relation to non-human contact
For those of you who have developed Internal Power/Strength (IS/IP), I'm wondering how it applies to non-humans, i.e. to inanimate objects (such as when lifting a heavy table/rock) and to animals (for instance when 'play-wresting' with a large dog, primate or bear).
I know this question may sound a little bizarre, but I'm wondering about the generalisability and/or limitations of IS/IP. And perhaps whether there are variations of the of IS/IP?
Thanks in advance.