So I rang the vet again,
he told me Bob is lonely and in breeding condition due to lack of UV.
Advice is to get full spectrum light.
Also when I'm gonna be out for a while move him right infront of the window, (North facing so no direct sun) so he can see the tiels in their aviary.
That way he wont be lonely.
He thinks we're making good progress with his training.
He said after Luna, Bob should be easy!!!!
If Bob keeps regurgitating I'll have to take him in.
He says that more light should stop his breeding behaviour as IRN breed in winter.
And then cure him of this behaviour.
In the mean time I'll spend time at home with him whenever possible.
get his stand made and get him tame.
He's a clever boy and will come right over to me with the door open as long as my hands are away.
Fingers crossed he won't harm himself in the meantime by eating part digested food off of a toy!