Using bathroom everywhere/getting older

[Lynz4]

I recently got 3 chinchillas, two 2 month old's and one 4 year old. I noticed that one of my 2 month old's is peeing around the pee tray and not in it. My other 2 month old is not doing this, also neither is my 2 and 4 year old. Is this a normal thing or?? Also I was wondering since I have 2 month old's what should I look out for when they start getting to that puberty age. Are they going to start not getting along with the 2 older one's, even before I got them they were housed with the chinchilla I have currently( was acting as their mom before I got her) and when I got them I also got the older chinchilla who was acting as a mother for them currently. They are all getting along great especially the 2 older one's, I was kind of worried they wouldn't after hearing people's stories of how it's harder to bond 2 older chins then it is 2 younger chins. Any advice/answers would be greatly appreciated.
(All my chins are female)

 

[tunes]

Some chins use the litter boxes, some don't. It's normal.

There is no way to know how they are going to act at any age, let alone puberty. Chins can get along for 10 years and suddenly kill each other. It is one of the most frustrating things I have ever had to deal with in chins. There is no rhyme or reason for it - just one day they go off. I always tell people to just be vigilant and watch for signs of fighting so you can separate them as quickly as possible if need be.

 

[Lynz4]

What are some signs of fighting? ?

 

[Godofgods]

i have a few that used litter pans then woke up one day and decided they no longer wanted to. No much you can do in that regard.