Okay, so. I'm doing some intros with my newest rat and the not sick rattie just 'cause they'll be living together (eventually, after Zephye passes). Vincent the new rat 'eeps' every time Nemo is near him, Nemo doesn't even have to touch him for him to 'eep' like crazy. Other than that, they'll box a little but no puffing. I've also noticed that when Vincent is in his cage he'll get very aggressive and charge at other ratties if they're outside. Does this sound like he needs a neuter or is it okay to keep continuing?