is this a good idea?

[tostaky]

...to mix formula with baby food in a bottle to give to DS2 because he gets upset everytime i offer him food (puree or finger foods)

to get some food inside him and also to get him used to different tastes

What age is he? Maybe he's just not ready for weaning?

you should never add anything to the bottles of milk as it is a choking hazard. What age is your lo?