So much of this depends on the dog, some are happy being the only dog but
many (more in my opinion) are very happy with a playmate. From what you've
said in this post and previous posts, Tallulah would be a great candidate for a
brother or sister! If rescuing, no dominate females & have them meet on neutral
ground, not your home and see how things go. Puppies are wonderful as long as
you are ready for the 'growing pains' lol In your situation, I think a puppy would
be ideal as I think Tallulah would be a loving big sister maybe even 'mothering' one.
Maybe an older puppy already potty trained, crate trained & knows basic commands.
I say, "Get one!" Much love...Carol