I do put in Josh's milk and it will just soften and dissolve in the warm milk, or you can soften it with his usual milk and feed off the spoon just before you give the bottle. 

my ds done that at 12 weeks it was due to him being hungry i started giving him some rice with his last bottle before bed and it worked a treat he slept right through again. he didnt like it in his bottle he wanted it off a spoon lol hes now 16weeks and has porridge for breakfast and rice for supper with 7 oz bottles

does it just dissolve in the milk?

Have you maybe thought of introducing a rusk at the last bottle of the day just to give a little more filling to her little tummy?

I introduced just a quarter or so of rusk at the last bottle and found this invaluable.  hth

My dd will be 15 weeks old on Saturday and has been sleeping through from 8.30pm to 7.30am since she was 7 weeks old and has been in her own cotbed since 10 weeks. Over the last  2 weeks she has started to wake up during the night, I'm up and down like a yo-yo putting her dummy back in at least 10 times during the night. Spoke with the hv about this last tuesday and she told me to introduce another feed in to her day, I said the only way I could do this was to feed her every 3 hours which she told me not too. Currently my lo has 8oz at 8am, 12pm, 4pm and 8pm and never cries for it inbetween these times, she won't dreamfeed so can't give her one before I go to bed and don't really want to get her back in the habit of having a bottle during the night. She isn't crying for milk during the night just giggling and moaning and generally just wide awake, putting the dummy back in her mouth makes her drift off again for awhile. Any ideas?