Mini daschund just over a year old. Over the last year has made a strange breathing sound like the sound a sheetzu makes when it has problems breathing. This isn't brought on by excersise or anything in particular. Out of the blue. Has maybe happened 6 times in the past year. Also snores if that matters. Do I need to be concerned? She has all her shots and is otherwise healthy albeit a few pounds a little overweight(what daschund isn't!) but no trouble being active whatsoever. Thanks kindly for all your input.

I'd call the vet and ask because it could be a number of things.
My Chihuahua does this because she has allergies to some things,
Especially perfume.
Hopefully it's nothing serious... good luck.