The time she spent with the little mutt turned her thoughts from sadness to happiness.
Here's a truly great thing about using mutt.
I saw a mangy mutt the other day trotting along the road with a big fat dead one in his mouth.
It is almost immediately joined on the left by the Mutt torrent, coming from a small glacier to the S.E., and then flows S.W.
Then the onus of responsibility would be on the owner, not the poor mutt who would much rather be roaming yonder fields anyway.