My 6 week old takes a bottle and also has a dummy. I'm going out at 1 for just over an hour to get my nails done so DP is going to take him for a walk in the pram, he will probably stay asleep however I want to leave a bottle of milk just incase. I've only got 1oz expressed and havent got time to express enough so would a one off formula feed of cow and gate ready to use do him any harm? I know it could affect milk supply but mine is pretty good so should be ok