Hello and welcome! You would be better with three females to start with incase you lose one unexpectedly and you are left with a single mouse. It gives you more time to find more to introduce to the two you have left in such a scenario. It`s a safety net for the mice too! 
Three are no more difficult to keep than two, believe me. They make wonderful pets and given the right care and environment, they will bring you a lot of joy. Make sure you research which substrates and foodstuffs you can get locally or online as it`s a good idea to prepare all this before your mice come home. They need a good few days to settle. A word about using Carefresh....Don`t! It`s one of the priciest and nastiest substrates out there and although it`s widely available, it`s over-priced and ther are many other good litters available. Check out Bedxcel.
Three are no more difficult to keep than two, believe me. They make wonderful pets and given the right care and environment, they will bring you a lot of joy. Make sure you research which substrates and foodstuffs you can get locally or online as it`s a good idea to prepare all this before your mice come home. They need a good few days to settle. A word about using Carefresh....Don`t! It`s one of the priciest and nastiest substrates out there and although it`s widely available, it`s over-priced and ther are many other good litters available. Check out Bedxcel.
