If I tell Kia to "come" it had better be dinner time or I'm in for it!

"Come" was the one command that Kia doesn't quite get and even after obedience class and all the practice, she still won't do it. "Stay" was a little shakey at first, but she's progressing very well.

She "heels" beautifully and "sits" without me having a treat.. but "Come"... oh boy... what a headache.

I wish she would come when I ask her too. Any suggestions?