Hi,
Are you doing mixed feeds for caloric reasons, or just to have a backup in place? The reason I ask is that we did mostly BF, but tried most days to give a small bottle of HA formula to see what she could tolerate in event my supply dropped, or I had to wean earlier than I intended. If it's for a back up, 2 oz is great!! Just to get her used to the difference taste and bottle. And yeah, I imagine it would be very hard to pump with 3 kids!! After having to dump my massive amounts of frozen EBM once we pinpointed her allergies, I just couldn't stomach the thought of doing it any more.
I found G took to the HA with very little problem. She couldn't tolerate nutramigen or alimentum, so went to Neocate. It was just a little a day, but if I did have to wean I knew it was a solid back up and she would take it, (and Neocate is pretty gross compared to Nutramigen!)
((((hugs))))