Sure - we're worried that we're not experienced enough to handle his anxiety issues (the tail chasing/biting).
I got the impression he's going to need someone who will be around all the time, someone who works from home or can take him to work with them.
If he came to us he'd only be alone 4 hours max at any one stretch, but I'm worried he could hurt himself in that time. I'm hopeful that his issues will settle down once he finds the perfect home, but bringing him home with us is just not a chance I'm prepared to take with his wellbeing.
Hope that explains everything!