Knowing that Eric was someone that could make even the Young Prince a toy, a dog that wouldn't even dare to bark without permission made the young man excited.
To be more specific it actually enflamed his ambition and greed.
When they were trying to survive and keep their dignity, trying to fight against all the negativity around them, it made the three of them united as one.
But now that their survival wasn't in question any longer while they were beside Eric, they started thinking for what lied beyond it.
Of course, this didn't mean that they had completely forgotten or disregarded each other at the moment.
No, it just meant that alongside their survival they had now started to think about their own personal goals and interests.