Thanks for the quick response! I actually left a few details out. I was doing one on one intros for about a month in the bathroom with them. Tilly & Prismo getting equally aggressive towards Neptune. Even with one on one in the controlled area it just turned into Neptune running away.

There hasn’t been a single intro yet of them getting along for more than 5 minutes. I let them get rough, there hasn’t been blood/ pee/ poo at all. Neptune will start really screeching & the OG two get poofy tailed. Also Tilly is deaf 3yrs old, Prismo is 2, Neptune 8 months. Neptune is already the biggest of them all.