They did get colostrum, and all seemed well when they went out after a day in the pen. After I brought them back inside with the ewe and got them warmed up and tubed, they were at her teats ALL the time, whenever she moved. So I think her milk proper just didn't come in (or not enough of it), she is a 5 year old girl.
They do chew and bite the bottle teat (and some milk does go down), I may try some honey on the teats, and I know they CAN suckle. After all one of them did really well for just over a day. They do not actually look ill (and one had a whole caboodle of injections initially), bums are dry, they pee for Scotland (mainly onto my leg when I am trying to feed them

), poo is the right colour, but not much of it. I will try and get them outside into a wee pen for a few hours soon, maybe they will nibble some grass?
As one of them alreday had a Vit B injection I also cannot give them anything else now I think, not sure if you can overdose them?