Pari passu
is a Latin phrase
that literally means "equal footstep"
or "equal footing."
It is sometimes translated as "hand-in-hand" or "moving together".
Aequo Animo translates as with an even (or calm) mind", "with composure".
No matter how much you love your animal(s), it is not enough to ensure good life. You'll have to add respect and knowledge to be able to fully meet their needs.
Never think your animal is stupid. In their actions, they are way more honest to their needs than us humans. So don't blame them for your own lack of understanding.