Hi Julian
Lots of love to you and your beautiful girls. I have read about girl rats doing their best in groups of 3 so that they can have a “social network”. I found this on woodgreen.org.uk:
“Rats can be housed in pairs, although a trio or more often live in better harmony as they create their own social network. Pairs of rats can sometimes get agitated with one another and will tend to show dominant behaviour. Time spent out of the cage and fun training can help prevent this.”
Now that sweet Bubbers is gone, I’m wondering if your two girls are fighting more due to the sudden shift in their pecking order. It could also be that they miss their sister and it’s putting them on edge.
I have 3 sister rats now that are 9 months old. They get along now very well with some squeaking and boxing matches that they get into (no blood is ever drawn). It’s fascinating to watch how these smart little creatures adapt and how loving and social they are.
Please keep us updated on how Berry and Chloe are getting along. Have you thought about introducing another rat into your fold? This may be just too much stress for them though.