Asking for a friend, please

Can some one please tell me the correct legal requirements about entry to UK from Belguim for a 9wk old pup. By ferry.

Many thanks, Marisa

A nine week old pup cannot be brought in as it has not has its rabies jabs yet.
Aileen

1. Overview

When travelling with your pet dog, cat or ferret, the rules you must follow depend on the country you're going to or coming from.

Travelling within the EU (or into the EU from another 'listed' country)

When travelling to or returning to the UK from another EU or non-EU listed country your pet needs:
a microchip
a rabies vaccination (make sure your pet is microchipped first or the vaccination won't count)
a pet passport or official third country veterinary certificate
tapeworm treatment (for dogs only)

You must also use an authorised carrier and an approved route.

You must wait 21 days from the date of the rabies vaccination before travelling.

In addition to what Merlot pointed out, why ferry? I imported a dog from Belgium last month, and it was incredibly easy to just take the channel tunnel. In fact it took me twice as long to get to the channel tunnel from my house as it did to get to the breeder in Belgium from the channel tunnel! We did it in a day. The only approved ferry route from Belgium to the UK for pets passports is Zeebrugge  to Hull with P&O, so you would not likely save any time even if the UK destination was closer to Hull than Folkestone. The ferry crossing takes over 12 hours according to P&O's website. It took us 6 ½ hours door to door from Yorkshire to the breeder in the middle of Belgium.

Eurotunnel is also the most actively dog-friendly operator.

More than happy with the Dunkirk (closer to Belgium than Calaise) to Dover route by ferry. 

Which we used when we flew back from USA to Brussels.

My husband won't use the tunnel.  He'd rather stand a chance of swimming in case of a disaster.