DD has caught a cold of me she's 4 months (runny eyes, cough, bunged up, sore throat, but of a temperature) but she won't take more than a ounce or two from her bottles, she's just had her morning one which she usually drains empty and has only drank 1OZ, yesterday she drunk about 2OZ each time all day but drained her last one empty at 11. Is this to be expected from a ill baby? She's had a cold before and it's never made her not drink?