Good questions
@Charlotte M
I like to "talk dog" when out and about walking Bonnie and standing around in off-leash dig parks- I meet the neatest people, btw. Having a dog and taking good care of it is the quality cut for anyone I want to spend time with...call
Me elitist, I dont care!
Anyhoo...this is pretty common;
1. Big strong dogs get returned often in the teenage knucklehead stage as most prople aren't able or willing to commit to the training (of the human!) thats required. Go see how many mals, gsds, whatever last years hot dog on IG or TikTok given up when the "influencers" fashion accessory is too much trouble to handle...
Rescue shelters either dont get that info or its not something most are going to go into...other than "its a lab mix, good with other animals" etc. Hope thats not too cynical but there is some value in that, if only for insurance reasons.
Sadly, shelters are under pressure of too many dogs or they gotta move product to keep the lights on...if you got a good healthy dobe in general with no temperament issues you are far ahead. The kidney problem is most likely just a function of "life happens" in this breed, frankly. From what you have written, it could be a symptom of several different origins...not a vet, nor disputing your's but just a fact.
I wouldnt spend much time worrying about the cause except pat yourself on the back for being a good owner of your passed away dobe.
And start putting that to work on the next one. Nothing heals the broken heart like a new dog.
And continue read up in general on dobe genetic issues- DCM, Copper Storage Disease, thyroid esp if spayed, seem to be the big three imho. VWD status should be known before going into surgery.
Get pet insurance right away on next dobe.
Wouldnt cover the pre-existing kidney disease but may help on other problems, so on the next one you'll have that lesson learned too.
Here is the deal: All purebreeds have issues due to inbreeding, some more than others and "dobies arent cheap or easy keepers as they say..."
but worth it for what they are bred for- i could go on and on how special but you already know that.
You might get some info on last dogs origin if you could have done an Embark DNA test, possibly locate littermates if those owners also did Embark and share results via the app "share" feature. Then talk to breeder if those owners can recall.
So put that on your list for next rescue dobe.
I was able to confirm BYB Bonnies NA/EU mix and surprisingly low COI of 21%, even though I couldn't get the breeder info; The one owner of a pup in same litter had his identity set to "private".
PS: does the passport have registration number on it?
@Ravenbird or someone familiar with AKC and FCI numbers can probably run down more info, and you can share privately using the little envelope symbol on to of the website header bar...
But if its any help- you did a great job, gave a dobe a new home, and you need to remember that and all the good you did.
And do it again. You are a good human being and some dobe will be waiting for you when you are ready.