
Bernese are called the heartbreak breed and often for good reason. I have owned, bred, shown and been involved with the breed for over 20 years now and I don't know the half of it. However I will give you the benefit of what I do know.
First of all, there are good and bad breeders both in the UK and in Europe. Buying a pup from Norway or France or Poland is no guarantee of longevity or good health, it does not matter where your puppy comes from, but what the breeder is doing to make sure they are producing the best they can is what makes the difference. So forget countries for the moment and just concentrate on doing research.
Finding a Bernese guaranteed to make 8 years old is impossible, here in the UK or overseas, there just are no guarantees. The average lifespan is approx 8 years and many live happy healthy lives for longer. Pups from good long lived ancestors can and do contract cancers and die young just as some from ancestors who died young can go on to reach 10-11-or 12.
The only thing you can do is to stack to odds in your favour.
Find breeders who are happy to tell you about the dogs in the pedigree, who understand and know the dogs there and have information about ages and causes of death. Compare pedigrees and the ages and causes, very important the causes !! If there seem to be a lot of dogs who died young to cancers maybe look again at other lines.
Only buy from breeders who KC reg thier pups, (Or whose pups are registered with the KC of the country of origin) and who health test for Hips Elbows and DM and learn how to interpret those results yourself. With parents full KC names you can look on the KC website and find the results yourself. DM results do not appear on the KC site so ask to see the proof from the breeder and learn how to know your puppy will not be affected. Bernergarde may give you details of overseas dogs and can be a very useful tool, but it is only as good as the information people submit to it.
Build a relationship with your breeder before commiting and see if you feel they are honest and careful. This is understandably easier to do if you both live in the same country but it is VITAL to do if you don't as well, its a breed you have little knowledge of and it's a little easier to suss out the Greeders in the UK if you can meet them and thier dogs than if you have to travel hundreds of miles to do the same in another country. People wishing to sell puppies can be very persuasive !! Meet them and thier dogs.
There is now lots of research being undertaken by Rennes University in France and a pre-histio indexing system has been instigated. It is not and I stress NOT a guarantee of a dog not getting cancer, its research being done to try and establish if there is any way of making a working tool to screen stock to give better chances of not passing genetic predisposition of Histio onto pups. An index of A,B,C is given and it has been shown the A dogs seem to have a lesser chance of getting Histio than B dogs and C dogs have more chance of having Histio, but A dogs do succumb to Histio and C dogs may not so nothing is cut and dried. That said, if a breeder is volunteering to get involved and have thier stock indexed they are showing some commitment to the cancer in our breed and trying to improve it. Bernese die of a variety of cancers and we have virtually no tools to help us breed these out.
You have not mentioned on very very important thing, Temperament, it should be top of the list alongside health for every breeder and it is not acceptable to breed dogs who are not of excellent temperament. You will be taking into your home a pup who will grow to weigh over 45kg and that's a lot of angry dog to cope with if the temperament is wrong
Last but not least, If you decide to go ahead and you find a lovely puppy, be prepared to lose your heart, soul and household to a breed that is unique in its people charms, they are very very people oriented, they do not take well to being excluded from anything the family do, they love without restraint and they show it in every move they make. You will be the center of thier universe and will give you every thing they have to give. Please only take a Bernes on if you have the time and love to give them back what they offer you. If you work 9-5 or have a hectic social life which they cannot join in with they are not the breed for you.
My dogs visit the vet rarely, they are raw fed and I do think it helps. But it's the same with any breed take time get the best you can and hope for the best.
PM me if you like for any info I can add.
Aileen