The dream interpretation of having toe amputated means you’ll face an event which may destabilize you. Toes are important to help us balance when we stand on our feet. Losing a toe might influence the spread of weight on the foot. this person may walk with a slightly uneven gait.
If the dreamer loses a toe, it can mean there is a loss of foundation. The dreamer is less grounded on practicality.
In the English language, we say to put the right foot forward, to mean starting with the correct action. Since the dream shows the right foot was attacked, it could hint of possible sabotage to the dreamer.