i have two guinea pigs my first guinea pig is piggy iv had him for almost 8 months already and this january i got anther one named simba he is a male guinea pig. When i tryed putting them together in a playpen piggy tryed to have sex with simba i do not no why he is doing this when i put them together he makes a cluttering kinda purring sound and lets out a really bad stench like a cats spray. Please help i wanna be able to put them together. Thanks.