I have never used Acana Pacifica; I use Wellness Core Ocean if I am not homecooking Amber and Ruby's food. I used Blue Buffalo for a while as a back up but Amber starting having a few problems so I switched them and have had no issues with the Wellness Core grain free Ocean. They like it and neither of them have the extreme gas they were getting on the other back up food. Sometimes it takes a little while to find the right one; I do know quit a few folks on this forum use the Fromm pork and peas. Good luck on your qwest!