Let me begin with saying that I am a new rat owner. My first rat is named Yeti, so you know. So, let’s start at the beginning. I have always wanted to take care of an animal, so I decided on a rat, did a ton of research, and got him. Yeti is a dream come true. He is a rescue, and was treated poorly before he was rescued. He was kept in a cage the size of a shoe box, was alone, had lice, and was starving. This brings me to what is worrying me. The rescuer said he hates other rats and I don’t know if it is because of hormones or something else. He seems to be acting normal and loves attention, but, as this is my first rat, I don’t know what normal is. So I want some advice. Is there a way to introduce aggressive rats safely, without getting them fixed or something along those lines. I have just read that they should never be kept alone, and I am really worried. Thank you so much for reading this, and for anyone who gives me advice.