You and your girlfreind had every intention of leaving for the magic shop. After all, it is the only way to see if there was an antidote to this BOD spray.
Of course, the real problem starts with that you're both naked, and your girlfreind has changed enough alraedy that clothes don't fit on her. "You know," you finally say, "At the rate you're changing, you'll be basically a dog in a couple hours. If we wait, I'll just take you out like we're going for a walk and no one will be the wiser."
Despite the fact that this plan doesn't make much sense, there are hundred of people effected according to the news so two more would hardly raise an eyebrow, she agrees to it. You open the back door and the pair of you run out into the sunshine to play. It turns out, you have been optomistic, as the changes speed up once they get going. Before the hour is up, she's completely in the body of an Irish Setter.
Since you got a much lower dose, you're not even close to as changed as she is. You check your reflection in a mirror after a while and see that your head is now completely that of a dog, a German Shepard to be exact, your body is still mostly human shaped. You turn to leave the bathroom, only to find your girlfreind eyeing you. "Wanna play, girl?" you ask playfully.
She responds with a quick bark and a couple of very strong licks at your penis, which wastes no time in responding. "Are you sure?" you ask, even as the blood rushes to your ears. She responds by turning away from you and raising her tail.
You fall to your knees and drink in her scent feeling your penis getting harder. In seconds, you're on top of her, pumping her until a knot ties you together and you fill her even as you continue to change.