Last week I caught the two of them piled on the bed playing. They must have played like this for 15 minutes or more. I thought I'd share some of the photos.
Note: Freki very gently mouths the cat and never closes her teeth on the leg or head or other cat part. Angus seems to reciprocate with feisty blows with sheathed claws. No cats or dogs were harmed in these photos :-)