Took perfect care of it. I never let either of her stats drop lower than one heart, and as soon as I noticed it, I filled it up again! Tedious work, but sooo worth it!
I'm only on my 2nd Gen, so it's kinda hard to vote. So far I've gotten Pyonchitchi and Mimitchi. Mimitchi wasn't that hard--But then again, I'm obbsessing over my tama ever 5 min, so... Yeah.