Maybe while someone else is home, take one at a time in another room and spend some one on one time with them. Then switch and do the other, this will let them know that THEY are the #1, and they will both feel this way?!
I only have one dog and have thought about another, and have worried abt this also,, but have read up on it, and they suggested alone time with the owner. Let me know how it all works for ya..
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Rhonda, Bailey, Josie and my angel Bella Rue'
"Until one has loved an animal, a part of one's soul remains unawakened."
~Anatole France~