Everything's been fine with my mischief for a bit now. My new guy integrated very nicely. His enemy is now his friend. I only have one problem and it's not with my new guy..It's with his friend, who is an older rat, cheese, 2.1 year old. Cheese just was at the bottom of the cage whining at his friend prodding him. I went to go check things out and i found him in the litter box(i use newspaper) he was reeee when i went to pick him up. he walks favoring the left side and almost in circles. I dont know if he fell and didnt have grip strength or if he had some sort of stroke or what. he has been greying in the snout hairs so ive been preparing for a bit. He seems a bit pale and is puffy.