Dairy sensitivity

Hi y’all

Anyone ever use similac alimentum for their baby’s who have a dairy sensitivity? We have to use the ready to feed because something in the powder doesn’t do well with him at all!

My dr and I agree we could try to start putting an ounce of my breast milk that is not dairy free into each bottle to see how he does. It’s been 2-3 weeks now and his face is broke out into an acne like rash like he’s a newborn again. He’s 9 weeks old, does anyone have any insight into if this idea a dairy sensitivity reaction or hormones from me still going through his body?? And has anyone else successfully got their dairy sensitive baby into their breast milk again without going dairy free?