Source : Webster's Revised Unabridged Dictionary (1913)

Knobbler \Knob"bler\, n. (Zo["o]l.)
   The hart in its second year; a young deer. [Written also
   {knobber}.] --Halliwell.

         He has hallooed the hounds upon a velvet-headed
         knobbler.                                --Sir W.
                                                  Scott.