I heard that Perendales had the best constitution, is this correct?

Because farmers have this perception that Perendales are the most hardy sheep breed, I am currently doing a test with Romney, Perendale crosses to examine the results. I personally feel that our high performances Romneys’ are as hardy as any Perendale. However the Romney, Perendale crosses will give me the opportunity to measure any improvement in our flock. And if I’m wrong I will be the first to admit it. These crosses will only be available for purchase to the public, if they prove themselves in commercial farming conditions.