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  Hi, I don't have a female yorkie, but I have seen a underwear/diaper like product in a pet store.  It looked as though there was only 1 pair in the package and was meant for this type of thing.  I didn't catch the brand of the product, but it was labelled in large font: "For When Your B*tch Is In Heat".  As immature as it sounds, I only noticed the product because of the label!  But I sincerely hope it helps you out b/c it sounds like the baby diaper can be pretty odd fitting on your fur baby!  Good luck to you!  
				__________________  Tobi's mom    |