I'm using the playtex liners & they only come in fast & slow. I just switched him back to soy which is a thicker formula & the fast flow nipples work fine with it (slow flow gets clogged with it). He's still very eratic with his eating, sometimes 2 oz, sometimes 3 oz & sometimes 4.
He just woke up at 9 pm after a 3 hour break between feeds & I made him a 4 oz bottle & he only 2 oz, I'm gonna go back in at 10ish & try to feed him the other 2, I know 2 oz won't hold him very long for night time sleeping.
He too is gaining weight, smiling, alert & cooing, except at our 5 pm "witching" hour in which he is very cranky but I hear that is normal. I just sit with him on the couch at that time since there is no point trying to put him in his crib, he just wants to suck his soother & cat nap & at least I can sit on the couch with him that way & quietly watch TV.
He's at the Dr on Wednesday so I will talk to her when I'm there.