sorry guys, they actually have just the same father.
These are the dogs:
female: Backy LO1326310 ( father: LO138514 - JASIRI-SUKARI BUCKING THE TRIND, mother LO1129801 ARLETTE)
male: WILD THINGS HAKUNA MATATA FRODO LO1642346 ( father: LO138514 - JASIRI-SUKARI BUCKING THE TRIND, mother LO12166021 - DOLLI AMBER SUN)
the pedigree also states that Dolli Amber and Jasiri Bukari has been "italian and international champion of beauty" and Arlette has been "italian champions of beauty"
I spoke ith the previous owner and he said they have no diseases. He said also that the fact they share the same father shouldn't be a problem.
The pedigree info can be found also on the italian site http://www.enci.it/ that is the official national institution of cinofilia.
@tanza thank you so much for your answer. Sorry if I didn't use the right terminology by the way. I'll keep you updated on what are we gonna do with these puppies. However, if we do take one, should we do the DNA testing anyway? What about the hips displasia? Is there a test for it too?