My dog Barney recently was treated for the leptospirosis infection. He was and is at very low risk for the disease but managed to show a positive blood test result anyway. I live in a city where my dogs walk on concrete sidewalks and only go into our backyard.
I stopped giving the lepto shot to my two older dogs in 2008 and my youngest dog has never had it.
I have been on the fence about this one myself. I did give it to my first two puppies 10 years ago but things have changed and some vets refuse to give it to toy breeds. My vet has advised against giving it to my dogs, even though the specialist who treated Barney thought I should.
I will not give the shot to my dogs, and it is still one of those topics where I might question this decision going forward.
There was a lot of discussion on Barney's thread, you can read it if you'd like
http://www.yorkietalk.com/forums/sic...ospirosis.html