BxrMommieNAZ
Boxer Insane
Wow 2 years old, I feel kind of bad for her to be alone even roaming the house and back yard until she was two years old.
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I had my ONLY Boxer for 4 years before we ever decided to get another dog, and he was very well adjusted very happy, and enjoyed the company of people, and playing with us. He did fine when we got another dog, but I honestly did not see him any happier or sadder before or after getting another dog, it was just simply a change to the household but didn't seem to affect him one way or the other. He still wanted our attention and to play with our son, and to have that human interaction regardless of another dog being here or not. There's nothing to feel bad about.
Honestly, it sounds like you want to get Roxy a "friend" so YOU don't have to feel guilty for not spending very much time with her, when the reality is she's still going to want and need your attention and so is the other dog. You don't have time for ONE dog how in the heck will you have time for TWO???? I wouldn't put an age limit on Roxy (although I agree not before 2 years old), I would put a time limit on when yours and your wife's schedule changes and you have more time for the one dog you already have. Then decide if you want two or not.