Chopper is adorable! I'm not really sure what to say though. I think you would know if you were at your limit. I would love another cat but when I think about it in my head all signs point to no. The only thing that would be a big concern is this.
I want to adopt him so badly but I just dont know what to think. part of me says, no! youre an idiot! you already have 4 pets too many, (only allowed 2 pets per apt)
What will happen if your lanlord finds out? While a lot of times people get away with having extra animals (I'm only supposed to have 1 cat and I've lived here for over a year now), occsionally the landlord does find out if there is a set limit on the apartment they will ask you to get rid of a certain amount or you will be evicted.

But if you are willing to risk it or don't think your landlord will find out then I say go for it. It sounds like you would be able to handle another dog.