my 10 wk old won't take a df unless her last feeding takes place before 7:30, which usually never happens- she always wakes for an extra feed around 8:30 and is so hungry. I usually end up feeding her, but then she won't take the df.... unless I try the df at 11:30 (even then she'll only take 2 oz.)
also- she never takes it if I try it through breast feeding- only if I pump and bottle feed the expressed milk, that way I can put the bottle in her mouth and she tastes the milk and will start sucking. If I give her the breast, she won't even open her mouth no matter how hard I try....