Abby is so adorable Ben, looks like she is having fun, keep it up.
Here's something for you to try...
Get a little loop, (big enough for her to walk through), a stick and a treat (if she wants one)
Hold the loop upright, you one side Abby the other side.
Stick you head in the center of the loop, giving her a kiss kiss, then pull back.
Alternatively hold a treat there or the stick.
Continue "playing this game" make sure you make it fun for her.
Eventually she will walk through.
Good luck

refuses to take treats any longer, I don't know why
When giving her her cereal in the morning or her yoghurt in the early evening,
she does 1 kiss kiss, turn 3 times, then high fives, then waves and now shakes my hand as well.
When doing her "talk training" at night she has never got treats.
(LoL she must concentrate)
I tried giving her sunflower seeds a few days ago while teaching her to pull her truck, she threw them back at me.
Me and my "bird brain" I realized she has never eaten sunflower seeds before