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  Actually 16wks is not too young to get the first BATS test done.  And you could request this of the breeder to do if you are interested in the 4mth old. 
 And btw the parents should have been BATS tested prior to breeding along with a few other pre0breeding screening tests.
 
 You do need to research this breeder, to have ideally prior to seeing the pups her health guarantee and what it covers if anything.
 
				__________________Razzle and Dara. Our clan.  RIP Karma Dec 24th 2004-July 14 2013 RIP Zoey Jun9 th 2008-May 12 2012. RIP Magic,Mar 26 2006July 1st 2018
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