I just got a new 2 month old, well socialized chinchilla to introduce to my 4 year old chinchilla that I have had for about a year. I wanted him to have a buddy since I am not around as much as I would like to be. I have had the new chinchilla for four days now and Sid (the older chinchilla) has been aggressive not only towards the new chinchilla, but also towards me (ie spraying urine, which he has NEVER done before). Is this normal? And any advice for introducing them? I have their cages next to each other and the new chinchilla is pretty chill and occasionally seems curious about Sid but Sid seems obsessed with the new chinchilla and will start biting at the bars of his cage if he gets close. Any chance of them becoming friends if I introduce them slowly?
NOTE: Sid had some issues with chinchillas in the past (his mom chewed off his arm when he was young, and at the last place he lived chinchillas tended to fight with him and pee on him), and he may have had some owner neglect but he has been doing great with me this past year.