Was thinking about exercise induced collapse about a month ago.... isn't it resessive? And if so, wouldn't BOTH parents have to carry it?
And since it is not mentioned as poodles carrying it, would not it just perhaps be a gene they carry in an F1 & F1B, and the Labradoodles affected be F2's and higher?
Although I have to say... that Looptails doodle sure sounds like the description for EIC. Sure hope it's not!