My 5 month old is drinking only 1-2 oz every 3-3 1/2 hours! She’s FF.

I been trying to encourage her to drink more, but she refuses.

She had an appointment a few days ago and is still gaining weight, and pedi didn’t say anything when I brought it up to her, but it still makes me feel a little worried because She used to down 4 oz so quickly a month ago.

Is anyone else’s baby doing this?