help needed please

ive got two staffys bailey and tyson,tyson 1 and bailey 8mnths recently bailey has started to have a go a tyson which happens sometimes wen tyson walks in the room or kitchen n 1nce wen in the garden,obviously tyson retaliates then ya get a full blow of em at each other.Its not an everyday thing bt would like sum advice how to prevent it appening or why bailey does it.most the time there the best of friends.

Are they both receiving sufficient exercise and training/boundaries within the home? Both entire?

both get took out 3 times a day there no prob out together or wen let of lead its just the odd occasion at home bailey will snap thn obviously tyson retaliates

does food or toys trigger it off?

not toys sumtimes if baileys near his food bowl n tyson goes to go in kitchen he snaps or wen tyson sumtimes goes bk into same room as bailey like a said its not n everyday fing jst dnt understand why bailey does it.

Are they both entire? Sounds to me like the little one is trying to establish authority over the older one...