Hi Dinkar, what you are saying is very true. Border-collie belongs to shepherd family and do need a lot of exercise, Weimaraner are active dogs too. But, SO ARE OTHER COMMAN BREEDS LIKE GERMAN-SHEPHERD, LABRADOR WHICH HAVE ALREADY ESTABLISHED THEMSELVES AS POPULAR BREEDS IN INDIA. if GSD can adapt themselves to this climate, so can border-collie and weimaraner. I'm quite sure, these two breeds can remain healthier than Saint Bernard and Bull or Nep Mastiff in our conditions.
Dinkar, let me tell you one thing very clearly, in India, people buy dogs looking at advertisements or movies not considering breed's specific requirements. My friend bought bull mastiff becoz he's favourite superstar, salman khan, has one. My neighbour bought pug becoz she was so fond of dog in that advertisment. White spitz became so popular after Hum Apke hai kaun. LOL.
Breeders will breed a dog only if it's favourite among people.Popularity will increase demand, demand will increase profits, profits will hike their balance in their a/c. Money plays a big role.
Introduce these breeds in Media and see how popular they become.