All First Generation puppies have poor health?

Dear fellow dog lovers,<br><br>As I was researching breeds, I stumbled upon a Chambers comment that left me amazed: “ First generation crossbreed dogs will have poorer health than a dog of a PURE lineage” <br>A Chambers comment unfortunately can’t be cited so I can’t recall the exact words, it’s just my paraphrase. <br><br>I would think that mixed breeds should have better health? <br>According to Coasts and Collins,2018, “The first hybrid generation will have heterozygous offspring in spite of the inheritable disorders from the parents”. <br><br>So the first crosses should have better health? Unless I’m reading this incorrectly. If you’re familiar with this, please share your insights! Thank you so much!<br><br>Sources: <br>Coast and Collins. 2018. Causes of Death in Pure and Crossbred Dogs. Animals. 8(5).