This has happened once before a couple of months ago but for a couple of hours and is worse today .... This morning my husband accidentally trod on the younger quieter cat and she yowled loudly. This caused the other cat (aged 4 older by one year and the more dominant ) to go for the smaller cat. There was a lot of noise and running up and down the house. There are no injuries but it is still continuing a lot of grumbling and noises, the smaller cat v wary, on edge and staying up high. Any suggestions?