Been there done this one Butterscotch like Ally being "first one in the house" is territorial. Thumper is that way also - Skinny is clueless at this point in time, he is so glad to have a home.

Time outs (just couple mins effective only after you've witnessed behavior) , squirt bottle and the firm "mom doesn't like this stern voice" worked out for us.

Now when things get out of hand all they have to see is the squirt bottle in my hand and they freeze