need advice please!

[jplum89]

Hi everyone :-)
I'm new here and in need of some help.
About a year ago I owned an 8 foot male boa.
He never ate when I got him.
I contacted old owners who suggested I try guinea pigs, deus, rats, small rabbits and quail.
I tried all of the above. Nothing.
Someone suggested a chick so I gave it a go. Success! He ate 4
Then nothing...
He would eat every 6 weeks but only chicks so a relative took him to see if they could work their magic.
He ate a rat in August and nothing since.
I am getting him back tomorrow.
He hasn't been handled in a month and is cold and just lays there.
He is in a big viv 5 x 4 x 2, I was going to put him in a 4 x 2 x 2
Or a large rub Maybe?
As my rock python hated big spaces and thrived on a rub ( he came to me on deaths door and managed to get him to eat chicks then mice at one point I thought he would die he was so lathargic)

Any advice for me when he comes back ?
I have tried:
Braining
Warming food
Covering it in chick skin
Rubbing a chick all over it

Thank you