I guess every BB is different. My BB though keep eating quite well (take milk plus solid food) but she got only 14 pounds, she is almost 7 months now, so I guess u no need to worry, BB will be just fine.
Below are the hard time with my 2 babies at that time!
One is 3 yrs & 8 months now. 厭奶期 was very terrible when he was 4 months old. Over 18 hours without milk, cereal, or juice, only water! I even brought him to see doctor at that time. Doctor gave one medicine for good appetite, but no function to him. We could only feed 1-2 oz with spoons, and syringe. Now, he is 36 kg la.
Another one is 2 yrs. 厭食期 was from 5 months. She refused all tastes of cereal. Her weight, before solid food, was 10kg on 4 months. Her body size was "Large" from 0-5 months. Then, her size changed to "Medium" from 8 months. Then, she tried to accept more variety of food. Now, she is 16kg la.
Lastly, I find out she doesn't love to eat those texture like congee or cereal. Maybe, that's why she didn't like to be fed with these kind of food. I believe baby has their eating preference. Maybe it is even in-born.
I had hard & worrying time. But, it's all PAST!
For those mummies who have a 厭奶 or 厭食 baby, don't give up when you're blue. They will grow up even they don't eat for a short period of time.