She walks funny, he hiccups

[mm224]

I have 2 chow/retriever mixes, 6 1/2 months old named Maizy (female) and Mojo (male).
Occasionaly, Maizy will walk through the house wierd, almost as if her 2 front legs are...bow-legged. We thought it was the tile floor then realized she does it outside too, but then she runs fine. Any idea why? She looks like she has more Chow in her than Mojo (see pic). We were wondering if maybe the Chow in her has something to do with it?
Also, we noticed when Mojo sleeps, he makes this hiccuping noise. It's really cute but we don't know what it is. We don't think it's anything serious but it still puzzles us. Any idea?
Thanks!!