My LO wouldn't take EBM from a bottle - not cold, not room temp, not heated, not nothing: booby milk came from the boob or no where! DH tried numerous times to get him to take a bottle and at the most he would have about 20ml.

When he was about 8 months, I was having one of "those days" tired and emotional (DH was away) so I gave DS1 (who's 16) a bottle of Bellamy's formula to give to my LO - he drank it all! My LO - not the 16YO!!

It took until he weaned for him to take a bottle off me, even then he was a little sceptical and would poke my boob.

Good luck and try not to stress - I'm sure he won't starve and will take food/milk from his carer when you are not there.