While Roxy was undergoing treatments, I made the decision to adopt another dog. Roxy and Zeus would only know each other for a short week before Roxy left us, but I am so thankful that I did. Zeus has been a great addition, and a wonderful help to us.

Here's a post I wrote when we decided to get another friend. Every situation is different, but maybe it will help you in some small way.

http://micaroxy.....xy-and-me/

First off it is wonderful that you foster and adopt rescue dogs. I'm in the process of adopting another Weimaraner. I lost my Tripawd last April and my current dog (a quadpawd) seems fine alone but I, like Karen work and am away from home about 9 hrs a day- 3 days a week. I feel really guilty leaving her in her pen alone. She loves my sisters dogs when they are here and they play and play. I definitely think the dynamic changes when you get a second dog but I don't think it's a bad thing. You won't love JD any less. Dogs are pack animals and they do love their kind. But they love their people too. I see it as a new friend for JD and you are rescuing a dog, all good stuff from where I'm at.

Penny, Blink and Spirit Maggie

I'm a little late to this post, but wanted to add my 2 cents.  😀  

You laid out all the pros and cons very conscientiously, and you will be the only one to be able to judge what works best.  4 weeks after my Brendol had her amputation, I came across another tripawd needing a home.  I already had Brendol and Aissa and 2 cats.  None of them were best friends, but they weren't enemies either.  All my fuzzy kids are pretty independent of each other.  I weighed the same fors and againsts as you did.  In the end, I chose to take in Adelaide, the then 1 year old husky.  Brendol had some fun with her and sometimes she was very annoyed with her.  Just like she would have been even if she was 5 years younger.  My Brendol did pass in August, 6 months after bringing in Adelaide.  But during their shared time, I think Adelaide helped keep a little pep in B's step.  And it helped me to not focus so much on my grief with her passing because I still had this happy energetic pup that needed me to tend to her.  My other dog, Aissa, is 11 and can't go for the same long walks as Addy.  To address that, I got a large pet stroller .  So we walk as long as Aissa can hang, and then she hops in for a ride the rest of the way.  

Hind sight, I'd do it all over again.

Since this intiial post was a month ago, I'm assuming you already made your decision.  I hope everyone is enjoying their time.  They are all very cute.  My Brendol was a pitt mix, so I have a soft spot for those sweet faces.  And JD has a very sweet smooshable looking face.

Karma, Adelaide and the crew, and our sweet angel Brendol