Wally the African golden wolf (Jockey's other son) is starting to crack his voice, developing his Adam's apple and becoming whinier than usual. He also has some of his unseen body parts developing pretty much later than those of other wolves. This indicates that he is on a growth spurt with medium amounts of testosterone like Black did.
It's called puberty, which means that he experiences more things inside his body than when he was a preteen. He is showing a risk taking, mildly but not too wildly psychopathic side never seen before. A few weeks later, he becomes bigger and more muscular, so his voice now sounds rather deep as crap.
Wally is going solo for years till he starts a family like Black does. All of a sudden, here comes his newfound girlfriend Scarlett. Scarlett is Tommy's daughter, who was previously thought to be dead.
'Hello Wally, my name is Scarlett.', the creepy wolf mistress howls. 'What am I supposed to do? Huh? Huh!? Well, let's talk about sex my girl.', Wally snarls. Both of the wolves bicker around for days - until a few weeks later, they settle down and successfully have a family of their own.