Billy walked down the hall behind Alex, all of a sudden loosing his balance and falling forward onto his hands. He then tried to push himself back up, but would only fall back to all fours after a few seconds.
"Ry can't I stand?" the berlion said as his thumbs began to shrink into a lion's dewclaw.
"Sorry brother, it's a one way street unless your me. Soon you will be a full bear-lion hybrid out there infecting others for me.
Billy tried to speak his anger but all that came out of his changed voice box was a growling roar, but quickly began to purr as Alex scratched his mane.
"Now now, you will have fun and pleasure just the same, off you go into the back." Alex said as he opened the back sliding glass door, having Billy go off into the woods to finish changing before going to find a victim.
Alex locked the door as he watched the hybrid animal slowly walk into the trees.
Fur and animal features began to flow back into Chase's body as he walked naked back toward the bedroom, his dick soon hanging down again.
Standing in front of the full length mirror he looked at Chase's average human body and thought "If i'm going to go out tonight, I better work on my body a bit." As he watched his body grew taller by 5 inches, making him 6'5" with a size 14 foot. His shoulders widened slightly as muscles expanded on top of them, pecs hardened in front. His abs tightened into a symmetric 6 pack as a line of blond hair pushed up them to the center of his abs. A small goatee grew in on his cuter face as he did a double bicep pose, his arms expanding with new muscle.
Knowing his body would be highly attractive to both sexes he was ready to prepare for the night.
Grabbing a few plastic cups he spread them around on the kitchen table. Over the next hour his dick changed shape 5 times, filling a cup before moving to another species. Alex then took 10 medicine injectors (probably used by Chase and Billy as shot holders) and filled 5 with unique animal types and the other 5 with mixes to make hybrids.
Soon he was dressed and ready to go out, the virus packed away and ready to be placed in people's drinks. He probably wouldn't get to see the changes because of the slow infection time due to the small amount he would be giving them.
Keys in hand he walked out the door...