Thanks all
She's ok
Went for a walk with Bb and was fine, they went to the park and into the smaller field, and she had a good run around. She's been funny since being ill, she's frightened of the big open field there, and of other dogs she doesn't know
Quite a lot of people whose dogs survive IMHA say they're not quite the same after.
We're pretty sure she did have a stroke, the first Saturday when she collapsed, and it's left her a bit wobbly and unbalanced. It means she's worried about other dogs, they might run around her too fast, she may want to join in but can't cope - something like that.
Anyway, she's had a couple of very small meals of chicken and rice and no poos so far, which is good
Also added a spoonful of yoghurt and decided to re-start the spirulina. Whatever's wrong is preventing her absorbing food properly so that may help a bit.