For awhile, Faulkner had a reaction to Sadie joining the household that I got GREAT advice about, from a Catter. She confirmed that it was a loss-of-status aspect of sibling rivalry as I suspected, and helped brainstorm a number of strategies that are actually possible within our complicated household, and they are working GREAT.

<> Both dogs happy, both humans happy
<> Faulkner's time with Lord and master increased
<> Special treatment for F that he understands as rights of TopDog status
<> F volunteers now to lick my chin, which was never a particular behavior of his toward me, confirming that he understands the permutations of the human/canine pack order well now (and likes it).

Thanks, Mudcat!

~Susan