omagawsh, there are so many adorable baby animals...*google image search*....

baby koala!


( more baby animal adorableness... )baby owl!


baby bunny!


baby corgi!

I know that they do.

After Izzie bites me, she immediately goes and hides under a chair, then licks my finger where she bit it, as a kind of appology. Obviously regretting what she did to make me feel bad.

As for long term regret, I'm pretty sure they don't feel that, at least dogs don't.