I have a hard time getting mine to eat rice too! But what works now is...
A chopper or mini food processor.
Put the chicken and rice and chop chop chop away, until the rice and chicken are tiny tiny mixed up pieces.
IMO Eukenuba is not a very good food. Try to get something that doesn't have "By-Products" or Corn.
Natural Balance has some for sensitive tummies (you can get it from Petco)
http://www.naturalbalanceinc.com/
Best of Luck!