We're thinking of getting a companion cat for Floyd but not sure if we should get a male of female.
He's been neutered anyway.
There are two rescue associations in Zona Norte that work well. One is Bicho Feliz and the other is Bicheras de Boulogne (now just Bicheras). We got Serafina through Bicheras and the late Bob through Bicho Feliz, and we also fostered a few cats for both associations when we were living in San Isidro.
When we fostered cats we could test Serafina's reaction to other cats. With some she didn't get along, with two she got along great, but mostly she ignored the intruder.
We regret not keeping the adult one she got along with very well, but we were living in a tiny apartment at the time. We were afraid she would miss him, but the truth is that when he left (because we found a forever home for him) she continued her life like nothing had happened. We were the ones grieving! He was such a good and great cat!
I think of getting her a companion from time to time, but I also remember that with some cats she didn't have a great feeling and simply avoided them.
Imho, it was not a matter of sex but of character. Serafina is rather shy and quiet, although she enjoys playing. Some cats were too aggressive by her standards. Both the ones she went along well were males. One was a 5-years old adult that was left behind when his family moved. We had him neutered but he was very well behaved and used to live in an apartment. The other one was a rescue from a Parking lot near the Court in San Isidro. We got him when he was about 3-4 months old and was very energetic. They played a lot, but he was surely going to turn into a dominant male once grown up.
I personally think that when you adopt an adult cat, you already know what you are getting, whereas with kittens it is a roulette.
You can see what they have up for adoption and foster on Facebook and Instagram:
Bicheras: https://www.facebook.com/BicherasBou/ - https://www.instagram.com/bicherasbou/
Bicho feliz: https://www.facebook.com/AsociacionBichoFeliz - https://www.instagram.com/holabichofeliz/
I want also to add this: when we fostered cats and had to bring them to the vet, some issues popped up. The vet gave us a talk how our responsibility is to keep the home cat cafe first and foremost, and to keep the fosters physically separated until they were cleared by the vet. Rescue associations do not have the funds (or the brain) to run a full check up on their rescues (like blood tests for parasites, viruses, and other illnesses that could be passed from cat to cat).
At least in Italy, when a cat is put up for adoption, at least they are checked for FIV (Feline Immunodeficiency Virus, the cats' HIV) and FeLV (Feline leukemia virus) as this will determine if they can live with other non-FIV non-FeLV cats.
This is not done here because they are considered expensive tests to run (actually, they should be around 6000 ARS combined, but associations do not have funds to run these tests for each rescue).
One of the rescue we fostered had a blood parasites that could be transmitted through fleas (Mycoplasma haemofelis), so we had to sanitize the whole house and the vet actually yelled at us for exposing Serafina to this risk. This cat was symptomless and she was in contact with Serafina since we brought her home, they played together etc. (she was a 5-6 months old female "saved" from a Chino store by a friend who actually stole her).
We acted in good faith, and we felt really bad for exposing Serafina.