When mixing a Pug with another brachycephalic breed like the French Bulldog (forming a Frug), what is a shared risk for the offspring?

Answer

Propensity for overheating and breathing struggles.

Since both the Pug and French Bulldog possess the flat-faced structure, Frugs are likely to share the propensity for overheating and breathing struggles associated with brachycephaly.

When mixing a Pug with another brachycephalic breed like the French Bulldog (forming a Frug), what is a shared risk for the offspring?
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