The Collaborative International Dictionary of English v.0.48:
Rut \Rut\, v. i. [imp. & p. p. Rutted; p. pr. & vb. n. Rutting.] To have a strong sexual impulse at the reproductive period; -- said of deer, cattle, etc. [1913 Webster]WordNet (r) 3.0 (2006):
rutted adj 1: full of ruts; "rutty farm roads" [syn: rutted, rutty]