I think one of my piggies is sick! It started about a week ago when he wouldn't let me pick him up later I found out that it caused him pain when his stomach area was touched. Then I weighed him he was about 23 ounces then I weighed him the next day same time and about 10 minutes after he ate same as yesterday same food same amount he gained 5 ounces! In one day! I need help plz I don't want to lose him... Also should he be separated from his cage mates???