Hi Andie,
Sounds like your dads billi levels are falling well and hopefully this will continue now that he has his new stent in place. My dad had the metal stent and this worked well for him once it was in place. As Marion says, a healthy appetite and generally feeling good are good signs. My dad had a little bit of pain for a few days after the stent was put in, but this was well controlled with meds. And I always knew when my dad was feeling good, as he was always hungry!
Best wishes to you and your dad,
Gavin