Hi, new to the forum but I need some advice.
I had 4 babies for a while and they were doing well and were happy and everything was fine and normal, but recently I decided to adopt a new baby ferret and that's when everything went from good to bad. For some strange reason ever since I got the new baby my ferrets have seemed sad and they're poop is very runny and watery. I don't know what to do because I've never experienced this at all in the past 3 years of owning ferrets, and I am worried that the new baby might have carried some kind of illness with it.
Should I be worried or do you suppose it is just stress of a new ferret that is causing the watery stool?
I am going to take them to a vet soon but I wanted to ask the opinion of other ferret owners since I am not as experienced with sicknesses in ferrets.
Is there any type of medication that you would recommend to help my babies poop become normal?
Or should I just wait and hope that they accept the fact that this is their new sibling? 


(also I would like to add that the baby ferret seems fine and healthy so far, other than still learning to use the litter in the corner like the  other ferrets, but his stool is normal and that's why I think it might be stress causing the older ones diarrhea. the new ferret is also a different color and type of ferret, all the others are sable masks and the new one is a cinnamon.)


They seem to like to poop on newspaper when they are outside the cage and playing, tried to introduce a litter box but they pooped outside and around it >.<