My advice would be against clipping dogs short that live outside, especially if they live outside at night! If your dog lives primarily indoors and is just left outside for the occasional potty break or a walk, then there should be no reason why the dog cannot get his/her coat clipped short. There are lots of lovely coats and jackets on the market that will keep your dog warm during the trips outdoors.
|Long winter coat option|
Depending the the condition of your dogs coat, another option would be to simply keep the dogs coat long during the cold months. Once the summer arrives (or better yet, if it arrives...stupid Irish Summers!), then the coat can be taken down in length again.
Hope that this will answer some of the questions that come up when deciding on your doggies winter groom!
Muttz For Cutz