Glad things are getting better for him. If Im correct you got him at the begging of the month. I don't know his weight but Balls go Months without eating especially during winter. A few weeks is nothing. Mine go 2-3 months. Force Feeding may not be necessary at all & Its very stressful on them. Unless he is starving (spine sticking up in a triangle shape) this would be a bad time to stress him more when his immune system is already down.