Background: H and I have been separated for 4 months now, DD had severe reflux as a baby which was slowly controlled with medication and cutting out dairy. She has no symptoms now so we are slowly weaning her off the meds and reintroducing dairy.
She is stage 1 reintroduction so she has a very small amount of cows milk cooked at a high heat. So a biscuit. We tried reintroduction about 6 weeks ago but she started symptoms so stopped for a bit. This is her first week trying again and it seems to be going fine. It was her first birthday over the weekend.
He usually takes her during the day every other weekend and has her at mine or takes her to his mums. He was off work for her birthday so he picked her up in the evening and had her during her birthday and brought her back in the evening. This is I believe her third overnight with him since we moved out.
After he brought her home and put her to bed he mentioned that she had had a chocolate cake for her birthday and is clearly fine. For context I did her a dairy free cake. I didn't react at the time, I was pretty shocked and I also shut down around him because of our history (lying, gaslighting, lack of support)
And now I'm not sure how to address it or if I should even try - his argument would be that it's only ever been suspected CMPA and she is clearly fine and he is the parent and can feed her whatever he wants.
Although I'm worried and angry that she could have easily been violently I'll (ill still be on edge today) i don't know what a confrontation will achieve except a massive argument and him doing whatever he wants anyway. And going full nuclear and stopping contact seems like an over reaction.
This man makes it hard for me to think rationally due to our issues so I would appreciate an outside perspective.