Before leaving it is a good idea to take your dog for a decent walk to tire them out and relax them. Also try to plan your journey to allow time when you arrive at the port to walk them again and to go to the toilet before you join the queue for the ferry. While you are on the Continent your pet will be able to live pretty much as if he was at home. However you should remember that you will not, as it stands at the moment, be able to go from country to country without the correct documentation, which will vary depending on the border you are crossing and in which direction. So thoroughly plan your route well in advance.
Animals take time to adjust to new places and routines.
Animals take time to adjust to new places and routines so try and keep to the same feeding times as at home. Animals' digestive systems also take time to adapt to new foods, so take plenty of their usual food, either enough for the whole holiday or enough to allow the introduction of new feed over three or four days. You should discuss the medication needs of your pet with your vet when you are sorting out the paperwork for the trip. Once you have achieved this you can come and go across the channel whenever you like, providing you re vaccinate your pet as necessary.