adopting a second dog

After getting my first dog, I quickly wanted another because he is absolutely wonderful. His only downfall is his separation anxiety. As a background, he is 5 years old and in his previous home he was raised with his brother who is the same age and breed. We assume they are from the same litter...

So, my husband and I constantly debate whether or not we should adopt another dog. I realize this is a very complicated question, but I worry our current dog (Theodore Rex) is lonely. He doesn't act up much (although every once and awhile he has bouts of excessive barking which I just posted...