Refused pumped milk?

Eveamlizya

So I went to take a nice hot shower while my mom watched DD.  I had some pumped milk in the freezer from 2 days ago (3 oz) that I thawed for her to give during my shower.  My mom warmed it up for her and gave her a bottle.  She hasn't refused a bottle the other times I've given her pumped milk and my mom said she took it fine, but she only drank 1 oz then refused the rest of it.  She was hungry, I know, and got hungry again an hour later.  I had smelled it before I got in the shower and it smelled fine.  Any reason why she would refuse it?