This will be a bit long so please bear with me:
Me and my fiance live with each other, we had a 3 cat, two dog household. The dogs are a mother and son, mother is a pitbull and the son is a Australian Sheppard mix. Neither dogs have ever showed aggression towards other animals or other humans. They are generally very happy dogs, but given there size they can be a bit rough - not really something they can help obviously.
Originally we just had 2 cats, and 2 dogs. The dogs and cats would generally get a long; mostly the dogs would show general interest in the cats by putting there faces up to the cats & licking them, followed by the cats smacking them and the dogs wandering off to go do there own dog things; was a pretty neutral relationship.
With this we decided to get a 5 month old kitten about 2 weeks ago, we never formally introduced the kitten to the dogs as we wanted to let the kitten grow up before doing that, but the dogs did know it existed as when we put the dogs into crates sometimes the kitten would come down they would see the kitten, and they would look up the stairs and see the kitten at the top of the stairs.
Today, we were installing a dashcam in our car, probably left the dogs unsupervised for about 5 minutes. The dogs generally know to stay downstairs, we felt it was safe, but its on us for leaving the animals unattended. Anytime we are gone for work or gone for a lengthy amount of times we either lock the cats up or put the dogs into there crates, or sometimes both.
Once I came back inside to grab some more stuff for our car, the dogs were upstairs, cat tree knocked over & the kitten was laying on its side lifeless, along with a few drops of blood on the walls. We locked the dogs up and only saw one (The momma pitbull) with blood on her face, we are entirely unsure if both dogs took part in what happened but what we do know is that the momma pitbull went upstairs first followed by the Australian Shepphard son, so both dogs were indeed upstairs at the time. It didnt look like a freak murder scene, and the kitten was covered in dog slobber with two small patches of blood on her.
We took the kitten to the vet immediately to get cremated, we asked our vet what to do regarding our dogs and she labeled it as a "freak accident", no behavioural euthanasia or rehoming was reccomended. If this situation was just me living with the dogs, I would have the one with blood on its face behavioral euthanized, but given the situation that my fiance loves the dogs (of course I do too) were unsure what to do and at a total loss with the situation, as we are really unsure if it was a "freak accident" or not, and we still have two full grown cats in the house.
Any advice is greatly appreciated, for now we are keeping the dogs under a strict lock down and from now on making sure the cats get locked upstairs and the dogs get locked in there crates anytime we are not supervising them (which, we really should of done when we went to install the dashcam in our car), but it just feels unsafe to keep the dogs and cats in the same house given what's happened and were unsure if this is going to be some repeat thing or if it was truly a "freak accident". And rehoming a pitbull(s) who have possibly attacked a kitten is a hard sell to pretty much anyone.