We have decided to get Sprite some 'clothes', since it is really cold and snowy where we live and he is always shivering and holding up his paws when we go on walks. But I have a question - are dog shoes/boots really necessary? We are worried that Sprite won't like them and we will be wasting our money buying them. A sweater will most likely be easier for him to get used to, since he already is comfortable with a harness. So basically what I am asking is, is a sweater enough to keep a dog warm enough?