i dont dream feed dear son once he sleep thur night, so i find it unnecessary since he alrdy sleep thru and they have to learn to sleep thru the night. if you keep dream feed him and 1 day you didnt do so, he will wake up for milk. It's like becoming a habit. i only dream feed dear son at 7am to start his day, then he will go back to sleep after milk. if not, his 1st meal (milk) of the day can start as late as 10am..
And i feel that your baby's weight is okay. 6.5kilo right? actually some babies, from 3-4 mths onwards, weight gain will not be much and obvious while some babies will slow down in their weight gain from 6mth old. as long as he is not losing weight, nth to wry about.
now you're wrying that he didnt gain weight, few mths later when he starts to cralw and walk, some babies not only didnt gain, might lost 100-200 grams..