Assalamu alaikum - our kitten passed away, feeling so guilty

Assalamu alaikum, everyone. A few days ago our 3‑month‑old kitten died and I’m really struggling. The room he slept in at night has a folded treadmill pushed to the side, and the morning I went down to feed him I found him stuck between the bars - he was already gone. We’d only had him for three weeks and I can’t stop replaying it in my head, thinking if I had done something different this wouldn’t have happened. So many what‑ifs. He’d slept in that room every night for the past three weeks without any problem; we kept him inside because he was an indoor cat and sometimes the kids would leave doors open. I found him the morning my husband and our 2‑year‑old were coming back from abroad and the image won’t leave me. I’m really at a loss and looking for what Islam says about cats and death and some reassurance. Inna lillahi wa inna ilayhi raji‘un. May Allah have mercy on him. From what I know, Islam teaches kindness and mercy toward animals and cruelty is forbidden. Try to remember your intentions and that you cared for him - accidents happen and only Allah knows the full picture. It can help to make du‘a for him, give some sadaqah, and ask Allah for forgiveness and comfort. Also do what you can practical: check the room, secure anything that could trap a pet, and talk to your family about it. If the guilt won’t ease, consider speaking with an imam or someone you trust for support. I’m so sorry you’re going through this - may Allah grant you patience (sabr) and ease your heart.