Ahh she is cute. 2-3 pinks every 5-7 days should be fine.
If she was in that cool of a room and off feed for a few weeks, he could have been brumating her..?

I have never sprayed my Kings, just gave them a bowl big enough to soak. Never had a bad shed and my oldest is 20+ years.

My smallest one is just a tad smaller than yours. (by looks) he is around 25g. I give him 2 mice pinks a week, sometimes I'll throw him 1 extra if one of my Rats leaves one behind. He is growing at a pretty good rate.

I also have a King that loves to chew on my finger. Sometimes they just don't bite and let go :p

My oldest has never bit.
I love when they get their tails going

Keep us updated. I love Kings !!