Take a look at Karma. 7 y/o red dun grade Q/H mare standing a stocky 14.2 hh.  She has done all aspects of ranch and feedlot work.  Started as a 3 y/o and been used consistently.  Her teeth were done 2 years ago.  Used on the ranch sorting, doctoring and moving cattle.  She is very cowy and when she locks on to a calf you better hang on good in the branding pen.  Spent 2 winters working at a feedlot as well we have taken her to team roping practices heeling, started breakaway roping  where she shows potential making nice consistent runs.  She has good feet and is good to trim/show.  Only been shod with cleats for winter and never been lame.  She can be cinchy and is not good with time off.  If ridden regularly she is fine but with time off she needs to be flagged or lunged to work out the kinks for that reason an experienced rider is recommended - that said we have had beginners that enjoyed riding her.