How long is too long when assist feeding corns?

[e.francis]

I've got two 2011 corns that have never eaten on their own. I've tried everything and still no interest. I've been assist feeding them since last Sept/Oct and they are tiny, they still look like thin hatchlings.
When would you say enough is enough?
I think I'm reaching that point but I just want to make sure I'm doing the right thing by them. I love the little hissers dearly but I don't want to prolong their suffering especially if there's no hope of them ever eating on their own.
What do you think?

[eeji]

I had to assist a non feeder for nearly 12 months and now she strikes hard and eats every time

[cris17]

i have a sunglow motley corn snake with an year old and neve eat by hitself, should i continue de process of force feeding for how long?