Originally Posted by rockyxpony
Oh and a note I must add- I don't know how flies are where you live but whether you cut the tail short or braid/bag it, keep in mind that her personal fly swatter is being taken away so she may need extra protection if flies are bad!
Trimming a tail is not going to alter the fly protection.
OP - yes wash the tail. We have several palominos. Tail washing is pretty much a weekly thing. When the tail touches the ground, we'll trim a couple of inches so that the poor horse doesn't step on it backing out of the trailer and do far worse damage than the trim does.
Tail bags are ok but I have yet to find one that will stand up to the torture my husbands "A" horse puts it through. I usually just wash, braid and tie it up with twine string.