If it were me, i might even considering moving if i thought that there was a possibility that a neighbor might have poisoned my dog, (my dog never leaves my yard without me, but is left in the yard. and since i watch what they do on a walk, i would have to assume that the only poison that could have harmed them was put into my yard. So, if this were us, we would probably sell the house since having a dog is such a big part of our lives. Oh my, i'm sorry you must be going nuts right now. I'm so sorry.
My husband is suggesting you talk to the police and let them know that someone probably poisoned your dog. Maybe there are others in the area that are also being p0isoned by some sick b@!#$%^%$. ?
As for having a new pup in the same place that your dog may have gotten into poison. If it were me, i would only walk my dog, and very carefully watch always whatever goes into her mouth. There are sick neighbors around that would poison a dog for barking, and because of what happened to you, if it were me, i would not let the dog in the backyard without my being there every minute.
OMG I'm so sorry to hear what you and your best friend have gone through, we're long time dog and cat owners and sometimes it is this quick. Our last dog went pretty much as fast as yours, and it broke out hearts. When we brought her in, they told us they had to put her down, so we brought our girl out for her last visit. Nobody else could get her to eat for 24-30 hours, but she managed to eat the meat off a Tim Horton's sandwich, and we took pictures and videos of her. It showed a Very Distinctive Royal Blue Aura around her neck in the film and the pictures - there was no missing it or confusing it. I have never been into chakra's , but the throat chakra is blue - this is what i found out after i saw the pictures. I'm a Pisces, and although it might sound a bit strange, have contact with the next world. I have sat down in the quiet and have heard a dog mouth making noises right beside me. There are mysteries in this world, but one thing is clear to me. Your dog sits and stays with you, stays loyal to you for your entire lifetime, in good health on the next plane of existence. I know how much you're going to miss your best friend, but please find yourself a pup and replenish your pack with new blood. Having a pup immediately will help you do what you do, care for these magnificent animals. Your dog lives and waits and watches until it is your time. I never thought i would be able to get a pup so soon after losing our girl, but after a few weeks, i realized that there was nothing, NOT anything could ever take away one moment of our love or our time with our girl. Remember, love is multiplied, not divided. Please let another dog help you through this time. sending my most sincere condolences.