Very much so. That's why is is often referred to as a 'wild card'.
Just remember ... anytime you introduce an ebony into a line, there will be 'dirty bellies' show up on down the line, sometimes when you lest expect or want it to.
To me, an ebony should be used
only with ...
1) another ebony, to produce more ebonies
2) with a beige, to produce tan wraps, this can take several generations, for a dark, high quality tan wrap
3) with violets, to produce violet wraps, this can take several generations for a dark, high quality violet wrap
4) with sapphires, to produce sapphire wraps, this can take many generations for a high quality sapphire wrap
5) with a large high quality standard to improve the line of the ebony
With #2, #3 & # 4, remember, all kits produced between the original breeding and the final high quality wraps can have and produce "dirty bellied" kits for generations, as far as the line can go, even if the chin itself does not show the dirty belly. There could be many standard born to these that would have 'dirty bellies', also.
With what I know now, I would
never breed an ebony to a white.
To me, I think, it is a waste to breed a white to an ebony ... that will produce many dirty bellies and off-colored/faded colored kits for generations.
A good black velvet put with a white can produce many of the same beautiful markings without dirtying the bellies of the kits down through the generations.
Jo Ann