Some Whiskas pouches do have cereals and as Mark said many have soya in (usually listed as vegetable protein extracts or derivatives of vegetable origin on the label) However, Whiskas
Simply pouches don't have any cereals or veg protein, nor does Whiskas
Supermeat, so you should be alright with those. Pro plan's ok as far as dry goes, better I guess than Whiskas dry, as more meat, less of the cereal content. I think HI Life pouches do a kitten pouch (although I don't think kitten food is absolutely necessary to be honest), more meat content, can work out a bit expensive, but you could alternate that with the Whiskas maybe? - always introducing any new food gradually though, to avoid tummy upsets.