When you play it slow, she says "una" instead of "un"
And that is true!, she says una for un
I agree we listened about five times and wondered why she was saying una instead of un!
This really sounds like IO CANE MARRONE, I replayed it several times!!!
Yeah, they seem to really run vowels together, not sure if that's just an Italian thing or part of Duolingo's voice.
From my (somewhat limited) experience of real life Italian, I'd say it's an Italian thing. Small words like ho or è are really hard to pick up at normal speed.