Hello all forumer, im a newcomer wish i could get some guidance with my cat problem.

My male cat is DLH name is Simba, he's already 2yrs old when i adopt him and i have another female cat name is Jojo bout 1 yrs old. So basically when the 1st day bringing Simba back home, Jojo did the cat "hissing" , i've read through the forum and found tht this is a normal thing. So im not too worry.

The prob is :

1. Day 1 : Simba vomitted n having diarrhea and pissing around the house.

2. Day 2 : Simba's poo is getting better(not having diarrhea) abit and showing that he's ok with the surroundings.

3. Day 3 : Sleeps the whole day at his fav spot. Poo is normal but he wont eat.

Simba wont eat unless i hand feed him or else he wont eat from his bowl. Based from my observation on up till day 3 , is Simba stressed? or izzit Simba missed my gf because my gf loves him soo much that she pats and plays with Simba more than me?

I hope forumers can help me on this. What should i do? Im worry because he wont eat that much...