Hey all, first time poster here.
My fiancee and I have an amazing 10 month old female short-haired Chihuahua named Bella. We really want to get a male so she can have a "cuddle partner". (The real reason is my fiancee is a teacher and she goes back home for the summer while I have to stay where we work because of my job, and I don't think I can be without my dog for two whole months

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Bella is spayed, but we may not be able to have the male neutered for a while since there is no local vet here. I am just wondering if this will cause any problems with his behaviour towards Bella, or just in general.
Also, I know there are differing opinions but I was wondering at what age would be a good time to have him neutered? I have only ever owned female dogs, so I'm not sure if it's different for males.