Spoilt rainbow chicken fingers

My baby is 2 and half years. He is still struggling to eat certain foods so I thought I would try the rainbow chicken fingers as I could not find nuggets. I got this Tuesday at Pnp and Strand Street Cape Town frozen section Tuesday 28th January. The fried two for my baby and she told me he had a bite and spit it out. She told me it does not smell good. I quickly checked the package and the 1 that she fried. The colour does not look right, they are smelly and the inside looks blue like old meat. I am so disgusted and so furious that this product is being sold. Something serious could have happened to my child, his still small. I am not sure how that bite has affected him and if his not going to fall ill, because he keeps passing gas. This is unacceptable Rainbow chicken. These chicken fingers could be poisonous. This is serious and needs to be addressed. I’m taking this chicken back to PNP tomorrow. I need feedback on this please.