Hi, Can anyone help. We recently rescued two girls. They live with our other girl and one male, who have been together for 2 years and recently lost their cagemate. They have all lived together for around three months but one of the new pigs is chasing after our female piggie, there is lots of teeth chattering, the hackles go up and then there is a brief 'lunge' type attack, nothing too serious, and then it all calms down for a while. We have also noticed when the chattering happens the male pig puts himself between the two, and sometimes goes to the aggressor and kicks her, which also ends the attack on the female pig. We have no idea what is going on and would appreciate some advice.