I have a 2 and ½ year-old male guinea pig (currently sick and on anti-biotics). I'm retired but still too busy to give Sparky the 1-2 hours of undivided attention he requires each day. Assuming he regains his health, I'd like to introduce him to a companion of his own kind. The companion must be at least 2 years old. I may consider adopting a pair--but only if they're 2-3 years old and are NOT able to reproduce (i.e. they must either be the same gender or one has beeen "fixed").