I'm one of the weird ones! I bathe 2-3 times a week. Kaji's skin is perfectly fine in fact he's so use to it, he doesn't fight the process and even runs under the spout himself to rinse off. Sometimes he's helping sometimes he's not.
If it's too cold, I might skip his mid week bath just because I don't want him to be cold. This is my personal preference due to a combination of things. Mostly it's due to allergies and my chronic bronchitis, and partly because I really don't like the idea of a dirty doggy sleeping in my bed.
