Legislation prevents you from taking cat and dog food from the UK into Europe unless it's vet-prescribed and you can show a prescription. It's always worth checking the rules and regulations of the country you're traveling to before you go, just in case this changes. This doesn't mean you have to stop feeding raw.
We recommend researching pet shops that sell raw pet food shops that are local, your point of entry, and where you're staying. Members of The Pack, our online community will have some great advice about feeding raw to pets while abroad. Raw-feeding Facebook groups in the country you're visiting will also be a great source of support too.