It's been a while since I posted this and actually forgot all about it.
Ellie May, A vet prescribed it.
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Afterwards I ended up studying and found Yorkies do a have a larger heart size to body ratio. I wonder if the vet knew that? Anyway, I ended up not using the pill for the "baby" about maybe 4-6 months later. She lived to be 15 1/2 years making it to the first week of June 2012.
Thank y'all for the replies.
Matthias