The chicken and rice should not make her sick... you boiled or baked it right? Maybe she just ate too much and it upset her tummy.
The first time my little ones threw up I ran to the vet.. and they told me to feed.. guess ... chicken and rice
I don't take mine in every time they throw up now.. but I watch closely and if continues I do.
I would watch her, be sure she drinks liquid and see if she has normal "poops". Watch for dehydration. If she acts off, is not drinking, or keeps throwing up you may take her in.
hope she feels better soon