Grieving having to rehome GSD while 7 days postpartum with my newborn son.

Honestly, I just need some support and to hear I’m not alone and that I haven’t failed. I got my wonderful GSD Nora 6-7 years ago. She is 8 now. I rescued her from a domestic violence situation where the guy was abusing her and his wife. She had a ton of behavioral issues (reactive, leash aggression, super high prey drive (this is instinctual though) - and we did extensive behavioral training for a couple of years and I showed her the world was safe. We got her to the point where I could take her to petsmart, dog parks, and could mostly control her reactivity. She has been my best friend for the last 6-7 years as I’ve gone through horrible things myself and she and I saved eachother.

I got her to a point of being healed and worked with her behaviors and personality over the years (even though she is leash reactive (and I live in an apartment now). We’ve had blips here and there, but I have managed her so well over the years.

Now, we brought my newborn son home 7 days ago and she went to nip at him and I removed her from the situation immediately. Separated to a different room in our home and set it up to be her safe space.

She is exhibiting all signs of prey drive that I’ve seen her have with squirrels, bunnies, cats, etc towards my son.

Luckily, my fiancés dad (who wants to take her and is happy to) lives alone on land with a house and will be building her an enclosure even to just hang out when she wants outside (she loves just watching nature).

I know this is the best decision and safest for everyone involved. But I’m grieving horribly while also trying to be happy about my newborn and this next phase of life.

I’m just torn up that she can’t join me. And I’m torn up that it wasn’t anything like we wanted.

Does anyone have any advice for grieving this?