Вот тут данные по Англии
В 2011 приблизительно 10.5 миллионов собак - это при населении 60 миллионов
То есть каждый 6 имеет собаку а если считать что в семте 3 человека - каждая вторая семья

И еще факты выборочно
27% собак были выкуплены или забраны из собчьих приютов против 20% купленных в магазинах
60% одиноких людей берет собаку или кошку как компанбона причем 37% из них взяли питомца взамен партнера




The UK domestic dog population.
A paper published in the Veterinary Record by Dr Jane Murray in the Department of Clinical Veterinary Science at Bristol University and colleagues, aimed to estimate the number of UK domestic cats and dogs and identify the characteristics of their owners.
In April 2011 there were approximately 10.5 million owned dogs in the UK and 39% of UK households own at least one dog.
Leading industry expert, the Pet Food Manufacturers Association (PFMA) carried out the research on behalf of National Pet Month, which celebrates Great British Pets and runs from 5th April to 5th May. It has provided an insight into the pet purchasing trends in the UK outlined as follows;
There are 27 million pets in the UK with dogs and cats being the animal of choice for pet lovers with over 7.3 and 7.2 million across the UK respectively. (The UK’s Top Ten Pets can be found in the notes below)
39% of London’s pet owners purchase their pet for companionship, despite living in the UK’s highest populated city.
60% of single people in the UK buy a pet for companionship – 39% of whom have replaced their partner with a pet
21% of pet owners have wanted a pet since childhood, and almost of half of people living in the North East have wanted a pet since their early years
The East Midlands has the most pet lovers, with 14% of the pet population living in the heart of the UK, compared to only 4% of the population residing in Wales.
39% of London pet owners feel the need for companionship despite having over 7.5 million neighbours across the city
21% of owners bought their pet for companionship, compared to only 5% who have their pet for security
Over a quarter (27%) of the UK’s pets were bought or acquired from an animal welfare or rescue centre compared to 20% from a pet shop