Yes, cats can remember trauma. When a cat experiences something traumatic, it can leave a lasting impression on them. This is because the event is stored in their long-term memory. This means that they will remember the experience for a long time, and it can affect their behaviour in the future. Cats may react to things that remind them of the trauma, and they may become more fearful or anxious. If your cat has experienced a traumatic event, it is important to be patient and understanding. Give them time to adjust and recover at their own pace.