So the cage was also neutral territory meaning they were in neutral territory for 1hr 45 mins before issue started. It can take them several hours to get through the early bonding stages. You keep them in the bonding pen with no hides for several hours, and then move to the cage after they’ve all had a nap. If they wake up from the nap and are all still ok then it’s generally safe to move then to the cage.
Were there any hides in the cage?
How old are all the piggies?
What are Bumi’s special needs? Not that that makes a difference to their ability to bond I’m just wondering if she was being pushed over not because of the others being rough as it were m, but because she isn’t physically able due to her needs to get away fast enough.
When did you get the two new girls?
Did you have them live side by side (in separate cages) with Bumi for a week or so before you tried the neutral territory. Or was it that you got them today and tried to bond today?
Lunging is a defensive behaviour rather than aggressive and I’m just wondering if you only got them today if she is simply scared and unsure. Fear aggression can come out in piggies who are unsure if they’re standing or unsure of their surroundings.
If you got them today and tried to bond today, it might be worth leaving them side by side for a week or so to let everyone settle and get used to scents. Then try neutral territory again for several hours (leaving in the bonding pen all day if needs be) and seeing how they go:
Moody Guinea Pigs: Depression, Bullying, Aggression, Stress, Fear and Antisocial Behaviour
Bonding and Interaction: Illustrated social behaviours and bonding dynamics