Hmm, I don't know how to make rats less affraid of dog other than to simply keep them in contact so they learn that they are not going to be hurt. This is assuming that they aren't going to be hurt. Dogs can be a bit unpredictable. My sweet, loving, gentle as a lamb, Greyhound after a year of being around my bird Tabetha just snaped at her one day! Lucky Tabetha has her wing feathers and can fly!

After each time you introduce dog and rat make sure you give both a treat for good behaviour then they will associate one another with good stuff! The fasest way to a rats heart is through his stomach!

Heehee

Cheers,
Tigeress