Hi guys!
I need urgent advice; last week my mom found a blind cat wondering around a bank, near the vet clinic I work at. He comes when called but doesn't allow to be held. My mom couldn't catch her and asked me to do it so I did, brought it to the vet, cleaned, vaccinated and castrated it and brought it home.
At first, it wasn't too aggressive (though it did rip my hands to bits while being vaccinated) and my two cats home were hissing and hitting it (we cut their nails before introducing the new cat so as to avoid injuries) but by the second day, they were getting along pretty well.
It's been 5 days now and while he is making himself home (jumping on couches, sleeping on blankets and beds etc.), he is hissing at us even when we walk by. If Jon (though he acts more like Joffrey) is sitting in the doorway, we can't enter the room because he bites and scratches our legs, even if we don't touch him.
He jumps on my lap and sleeps there, rubs against my legs and purrs and I don't even breathe but he suddenly starts biting for no reason.
He is particularly aggressive and visibly uncomfortable when my little brother is around although he hasn't even touched him.
We are all getting paranoid, even the cats, and my mom wants to take it back where we got him before he gets too accustomed to indoors (I contacted the rescues I worked for and they all say that if he is THAT aggressive it either won't be adopted or will be kicked out of whatever home it finds).
He is the least aggressive when around me but I will leave for a week for an interview (overseas student) and my mom really isn't comfortable with the cat. She is afraid that he might attack my brother when he's asleep (my other cat likes sleeping next to him so we have to leave the door open), and that might very well be the case.
I don't want to give him away or drop him off (he has access to food there as the shops around feed him).
Oh, and he is 1.5-2 years old and has been blind since it was a kitten, maybe even born blind.
What should I do?