Wry neck can occur in any chicken at any age, and it is always treatable. Degree of success may vary. If the condition is due to brain damage or a genetic flaw, of course the success may be limited.Presumably this is not possible to treat in an adult bird, 10 months old.
Other baby chick conditions such as splay leg and curled toes do have a window of treatment, and the longer you wait to treat, the lower the rate of success.
