AnnaBelle is just not happy in her cart or around the other dogs...

[Canis-Lupess]

I agree about giving her time to adapt. Also, when she starts that pining trick, as hard as it is to not do it, responding with reassuring words just reinforces the behaviour and makes her do that on purpose...just for the attention. You're sort of praising the "Sad", behaviour and so encourage it to go on even when she isn't sad, she'll act that way to get a response because she knows it works.

Dogs are adaptable creatures but she'll not learn to adapt whilst she is being praised for sitting there and whining, she'd rather carry on doing that instead.

Sounds harsh, I know. Don't give up on the wheelchair thingy and don't take her away from the other dogs. They seem to get on ok and she isn't scared of them...just ignoring them a little. She'll start to interact more once she gets used to spending time with them again.

[shepgirl]

I was wondering if maybe she feels trapped and helpless being tied to the cart? Maybe she feels defenseless if something should happen. I did find that she looked uneasy with the whole thing. Maybe take the above advice and go about your business as if everything is fine and dandy. And if she does take a step, lots of praise and a special treat that she gets only when attached to the cart and does well. If she knows the recall maybe try calling her for a treat. If she won't come for that, place a treat 1 foot away from her so she will have to go forward to reach it....something she loves and with lots of good smell to it.
Give her a bit of time yet and if she doesn't come around maybe speak with your vet.

[kimlovescats]

Thank you for all the concern and heartfelt advice! Daddy and I both worked with her a bit this weekend, no major breakthroughs but we're trying.