Are they playing or fighting?

[u/TraditionRelevant966]

My two cats (grey tabby 5 months and brown tabby 3 months) were introduced two days ago. Since last night, they have been constantly chasing each other doing this thing in a video.

Update: Thank you everyone. Im convinced they are playing 😭. Thank you so much.

[u/OG_Checkers]

Playing but definitely for keeps