I have three guinea pigs (Betty = 5, Peaches = ?4.5 and Burdock = ?3). The females (not related) were adopted in July 2020 to be company for a widowed male (a gentle giant) - they all lived together quite happily (Peaches adored him). In July 2021 I adopted Burdock to join Betty and Peaches after original male passed away. Burdock was a junior who had been neutered and lived alongside the girls for three weeks. When I put them together everything was fine - Burdock adored Betty and got on okay with Peaches. In May 2022 I moved them in to a 4 x 2 C&C cage - hidey's for each with two entrances, two hay mangers, two water bottles. However, over the last year, Burdock has been picking on Peaches (she is a small guinea pig but very fluffy, he is quite muscular/solid). I realise some of it is about dominance (she squeals and freezes when he is just approaching her and he bites me/my clothes if he can't get his way!) and it is not constant (eg I will find them sleeping together in a hidey) but she has quite a lot of scabs at the moment and I definitely caught him with some of her fur hanging from his mouth the other day. I would appreciate some advice on what to do - would a larger cage help (although the fur incidence was whilst they were in their run which is currently 5 x 3 c&c) or should I separate them to live side by side (for a while or permanently and which should be by themselves)? (Sorry for the long message)