
I had one boy chihuahua for 15 years on his own and he was fine as he had the children for company as they grew up together, but then we bought a girl chi pup, he was put out and a bit jealous at first but okay after he got used to her, then we rescued another girl chi, sadly he passed on 9 months later 3 days before his 16th birthday, then we bought another girl chi, then rescued another girl chi so had 4 girls in the end at one time, then sadly 4 1/2 years later our first rescue chi died, so now we have three girl chis,The two little ones see the elder one as a sort of mother figure.I would also choose a girl to go with a boy but i do know people with two chi boys who get on fine.Good luck with whatever you decide to do.