Hi Nixz. Ex dh and I split up when ds was 2 (he's 7.5 now) and he's always seen his dad and grandparents in London every other weekend (it's all amicable). When we lived in Devon that involved ds travelling 250 miles every other Friday and 250 miles back every other Sunday. Dh and I would meet half way. It wasn't ideal and I kept trying to find ways around it, like cheap flights, but couldn't so we moved in the end to be 2 hours nearer ex dh. I was the one who moved to Devon from London and in hindsight I shouldn't have done, it was too far away. Now ds has a 2 hour journey door to door instead and I think it's much more manageable.
BUT ex dh lets him eat crap, watch too much tv, play too much playstation, stay up too late (midnight fgs) and THEN wonders why he can't deal with his behaviour. Er, you give a child crap food, e numbers, no exercise, not enough attention, late nights = recipe for disaster imo! Plus they have no real rules there, ds is in charge. More fool them I say, rods and backs etc so it's their own fault. Anyway, I decided a long time ago that I can't control what happens while he's there. I can say what I think and I can do what I think's best while ds is with me, which is after all most of the time, and beyond that I can't do anything.
But I didn't have excema to cope with. I agree, can you get something 'official' to say she mustn't have xyz and give it to your ex? I think your dd will get used to the fact that your rules are one thing and his are another, they do get it I think although I did have some bad behaviour too at the beginning. Can't your dd eat the healthy picnic in the car? They don't have to stop for it. The trouble is your ex (and mine, and ex ils) think it's kind to give a child junk, let them do what they want, stay up late, have no rules. I don't, I think children need boundaries and rules and healthy food with the odd treat. But I can't control my ex and I doubt you'll be able to control yours either, except you have a solid official reason not to let her have crap so maybe you will be able to get your ex to see that it really is in her best interests. Good luck, it's hard I know.