One of my guinea pigs is deteriorating in health. I have been to vet three times and she has had treatment but it seems she may have some sort of terminal illness. She is 4 years. So as long as she is happy and eating i am just letting her enjoy life. However, the other piggie, the more dominant one has started to torment her when she tries to rest. I feel so sorry for her that I am seperating them last thing at night or she would never get rest. I put them in a large run in and out during the day. They have always got on up to now. Just want to know if you agree its best just to seperate them at night so she can have some peace. They are not cramped and have a lovely big cage in and outside. I have them inside at night and when its cold.