If animals are not rational, and Kant’s ethics only extends over rational creatures, do you think Kant takes animals wellbeing into account in his ethics?

A Short discussion

Kant’s ethics extends over all rational creatures. Do you think birds and mice have the same kind of rationality that we do?

Things to consider:

Can birds and mice understand mathematics?

Do you think humans are the only rational animal?

If animals are not rational, and Kant’s ethics only extends over rational creatures, do you think Kant takes animals wellbeing into account in his ethics?