As-salamu alaykum - my kitten passed away, I need some comfort

As-salamu alaykum, everyone. A few days ago my 3‑month‑old kitten died and I’m still really shaken. He used to sleep in a room where we keep a folded treadmill at the side, and that morning when I went down to feed him I found him trapped between the bars - he was gone. We’d only had him three weeks and I keep replaying every decision: what if I’d done this differently, what if I’d checked sooner… so many what‑ifs. We kept him as an indoor cat so he stayed in that room at night, and sometimes the kids accidentally left doors open. I found him the same morning my husband and our 2‑year‑old were arriving back from abroad. I can’t stop seeing the scene and it’s really getting to me. I’m looking for what Islam says about cats and death and also some reassurance - I keep worrying if this was my fault. If anyone can share gentle advice: from what I’ve read and heard, cats are beloved creatures in Islam and showing kindness to animals is rewarded. Try not to be too harsh on yourself if it was an accident - Islam judges intentions, and accidental harm isn’t the same as deliberate cruelty. Make dua for him, ask Allah’s mercy, and if it helps do a small act of charity or feed other animals in his name - that can bring comfort. Practical things that might help: bury him respectfully if you can, say a short dua, and talk to a local imam or someone you trust if you want a more specific religious view. Also allow yourself to grieve - it’s okay to be upset. May Allah grant him mercy and give you patience. Please keep me in your duas.