It's a tough call. If you have the means and ability to dedicate the time required to tend to the needs of both the new pup and Buddies needs go for it. Just remember to be patient and give love to both equally. If not then I would hold off. As far as an older pup living longer with the addition of a young pup I cannot say but in my experience it could be possible as my boxer was 13 when he passed last year and had younger pup to play with all day.
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