the poor dog and em's RADical comment

So the poor dog had a seizure or something this morning. She's older than dirt and getting stiff and frail and all, but she'd been in bed with CJ and I went up to wake everyone up (which is odd in itself). But she got down and went in EM's room and was walking around as usual. I was trying to pull MR off the top bunk and heard her fall (hardwood floors) and she started thrashing around. I'll spare you all the details, but it was freaky scary! It was loud and long and the kids saw it all. She finally calmed down and Dad carried her downstairs (wasn't sure if she hurt anything) and she went outside and seemed fine. She appears to be fine still, no problems all day. So we're just a bit nervous now.
The RAD tie-in (isn't there always one?) is what EM said. (Fyi, she's been asking for a puppy, and as good RADical parents we've been saying no). As Dad carried the dog down the stairs, she said this wouldn't happen if we had a puppy. I was so glad Dad was holding the dog! I just told her that was very inappropriate and we'd talk about it later. But I was struggling between being mad because I was worried about the dog and sad because I understand she's not capable of understanding why that was awful to say.
And I wish there wasn't more to the story, but I guess I should confess my screw ups here, so here you go. I meant to explain it well so she'd understand why that was mean, but I was still mad (yeah, unregulated, thinking about me, I know). And I said (cover your eyes) you know when you're having a hard time feeling your feelings? How would you feel if we said this wouldn't happen if we had a normal girl? She said bad. I said yeah, but we wouldn't do that because we love you no matter what. And went on to make nice, but sheesh. I felt bad. Just frustrating and yeah, not handled the best.
On a positive note, Dad walked in soon after and I told her she ought to apologize and she did, with real tears in her eyes! She seemed genuinely sad, not just sad she was in trouble. So, maybe a little positive anyway.