After the rough night at Will's, the rest of Jay's week seemed to go uphill. Their case was relatively easy and they only reason their elite unit had it was because the victims were high profile in the Chicago area. Voight seeing the dedicated, hard work that his team was putting into the case, let them leave at a somewhat reasonable time.

With Casper in the cage all day, Jay declined going to Molly's with his colleagues, not wanting to leave him by himself or in the cage any longer than necessary. Jay also wanted to continue the bonding process with Casper, as both Hailey and Will told him that it is important for the two of them to bond for Casper to become a successful service dog.

Some days it was just Jay and Casper and other nights Hailey would come over to Jay's place to hang out with them or he would take Casper to her place if Vanessa was going to be out late. A new norm has also started since his night at Will's; now every night a phone call takes place between the two brothers unless Will gets caught up in an emergency in the ED.

Jay has learned how to balance training Casper and letting him be a puppy. As far as training goes, for now, Jay is sticking to the basic command that all dogs can be taught, as he heard that training them for the tasks that they are to perform as service dogs should wait until they are eight months old.

With the vet appointment coming up, he wonders if he should follow Hailey's advice and at least tell Voight about Casper. But at the same time, he has been having trouble telling where he stands with Voight. "What do you think, Buddy? Should I tell my boss about you?" Jay asks the puppy. Casper's response is to leave Jay, only to come back a moment later with his leash in his mouth. "You want to go for a walk?" Jay asks. Casper barks happily while running in circles in front of Jay, showing that he is still just a puppy at heart and not always training to behave like a service dog. "Okay, come here," Jay orders as he clips the leash onto the excited pup's collar.

Making sure he has bags for Casper, his phone and his keys to get back in, Jay and Casper head out into the Chicago night. Jay uses walks as an opportunity to teach Casper to heel, which is easier said than done. They walk until Jay notices Casper starting to slow down, "Come on, boy. Let's go back." Casper makes it halfway before he refuses to walk anymore, forcing Jay to pick him up and carry him the rest of the way home.

When Jay places Casper down once back in their apartment, Casper goes to his water dish to drink before collapsing on the nest of blankets that Jay has started keeping in his living room for Casper to sleep on.

Jay lets Casper lay there until he goes to bed, calling Casper to go in his cage.

Tuesday arrives quicker than Jay would like, still keeping Casper a secret from his team, sans Hailey and Kim, who found out by accident, Jay is hoping Voight won't give him trouble about leaving early.

Jay gets up and starts his new morning routine of taking a shower before letting Casper out and coming back in to feed both of them. "I'm going to be home a bit early today, Buddy, but you're not going to be happy," he tells the dog as he puts him in the cage so he can go to work.

Jay arrives to work early, hoping to talk to Voight before the rest of the team gets in. Entering the bullpen, Jay finds that he is the first to arrive with the exception of Voight. "Sarge do you have a second?" Jay asks while knocking on the door to his office. Voight nods his head and Jay takes that as a silent indication to enter his office.

"What is it, Halstead?" Voight gruffly asks.

"I have something that I need to take care of tonight. I need to be there at five; I can come in early tomorrow to make up the time."

"What do you need to do?"

"That's personal."

"Are you going off books for a case?"

"No."

"Are you in trouble?"

"No."

"Remember: You need to tell me the truth so I can lie for you."

"I'm not lying. Hailey knows what's going on."

"Okay," Voight answers before going back to the paperwork on his desk, ending the conversation.

Jay heads back to his desk before Voight can change his mind. When he gets to his desk Jay sees that the only one who is missing is Ruzek.

Hailey sees Jay coming out of Voight's office and silently asks, "How did it go?" Jay nods his head, indicating that he is able to leave early.

Having finished their case the previous day, Voight has the team filling out the paperwork so they don't get on the higher up's radar for the files of a high profile case.

Close to lunch, Hailey decides since it is not a busy day, she would make a lunch run for the team. After taking everyone's orders and collecting the money Hailey grabs her jacket to leave. "Jay, wanna go for a ride?"

"I need to…" Jay drifts off hoping that Hailey would get the idea that he needs to let Casper out.

"No, problem. We can do that on the way." After hearing this, Jay grabs his jacket to follow Hailey out to her car.

"So, how'd it go with Voight?" Hailey asks once they are in her car.

"I can leave early. I mean he questioned my motives a lot, but he said okay," Jay answers on the way to his place to let Casper out.

Arriving at his apartment building, Hailey asks, "Do you want me to wait for you or pick you back up on my way back to the district?" Hailey asks.

Jay takes a moment to answer, as much as he wants to stay with Casper for a while, he knows his building is out of the way of where Hailey is picking up lunch. "Just wait, it won't take long," he tells Hailey, already halfway out of the car.

Five minutes later, Hailey spots Jay outside of his building with Casper on his leash. She laughs to herself as she sees the small puppy making a poor attempt to take Jay for a walk. Once Casper is done, she sees Jay take him back inside before reappearing a few minutes later.

"Was he good?" Hailey asks when he gets back into the passenger seat of her car.

"Yeah, he's a good dog," Jay smiles.

"Yeah, sometimes I forget that he's only a puppy with how good he is," Hailey responded as they pulled into the take out place.

Back at the district, Hailey hands out the food to everyone once they get back.

The rest of the afternoon, the team works on updating their CI files, hoping that a case doesn't come in. Jay keeps a close eye on the clock as he does not want to mess up with the vet.

At a quarter after four, Jay leaves wanting to pick up Casper and get to the vet a little early in case he has to fill out some paperwork.

When Jay gets home and lets Casper out of his cage, the puppy is very excited to see him. "Come on, Casper. We need to go." Jay takes Casper out before putting him in his truck and driving to the vet with the directions that Will gave him.

Arriving at the vet's, it is like Casper senses where he is as he starts to shake and cry. "I'm sorry," Jay apologizes to the dog. Casper doesn't want to get out of his truck, forcing Jay to carry the frightened dog into the building.

"How can I help you?" a lady behind the counter asks.

"Um, he has an appointment at five for his next round of puppy shots," Jay answers while gesturing to Casper, who is still in Jay's arms.

"Okay, and his name?"

"Casper."

"Last name?"

"Halstead."

"Okay, and he's new?"

"Yes."

"Okay, I just need you to fill out these forms and we can get Casper into the system," she tells Jay as she hands him a clipboard.

Jay fills out the forms, not realizing how much information there is needed for the dogs. Once he finishes, Jay takes the clipboard back to the lady before dragging Casper back to the waiting area as he tries to get outside. Tired of Casper trying to leave, Jay picks up the scared puppy.

"Casper Halstead," a tech assistant calls out.

Jay stands up and carries Casper as he follows the tech assistant into the examine room. "I'm going to take him to the back to weigh him," she tells Jay as she reaches for Casper's leash.

Although scared, the young puppy knows that he is supposed to stay by Jay, he is also scared to go with this strange lady. Seeing that his dog isn't moving, Jay encourages Casper to go with her, "Go on Casper. It's okay," he tells the dog as he motions for the dog to go at the same time. Seeing his owner showing him that it is okay, he lets the strange lady lead him to a different room that Jay is not following them too.

She leads him to another room where he has to step on to a metal contraption before she finally takes him back to Jay. When Casper sees Jay he hurries over to him.

"The vet will be in shortly," she informs Jay before leaving.

Jay picks up the scared dog while they wait for the vet.

The vet appears after five minutes, introducing himself, "Hi, I'm Dr. Richardson."

"Hi," Jay replies, "this is Casper," Jay indicates to the dog in his arms.

"Hi, Casper," Dr. Richardson speaks to the puppy as he puts his hand out in front of the dog for him to sniff. "So, Mr. Hals-"

"Detective," Jay interrupts.

"Sorry. Detective Halstead, it looks like Casper is a bit underweight. Is he eating alright?"

"Yeah, the guy I got him from said that he was the runt of the litter, but that he was healthy now," Jay answers concerned.

"Okay. He weighs almost twenty pounds. A Lab his age should be between twenty-four and twenty-eight pounds."

"Okay. Is there something that I can do to help him?"

"No, he should be able to catch up as he grows, but he'll probably always be on the smaller side."

"Okay, we can handle that," Jay says relieved. "Can't we Casper?" he asks the dog.

"Let's get him on the table so I can take a look at him," Dr. Richardson states, indicating he wants Jay to put Casper down. Jay puts Casper on the table and holds on to his collar so he doesn't try to jump off.

After examining Casper, Dr. Richardson turns his attention to Jay, "Everything looks good. Now, when the appointment was made, it was mentioned that he needs his next round of shots?"

"Yeah, he needs the third of DHLPPC, and the first of Bordetella, Giardia, and Lyme," Jay reads off of the paper he printed off from his e-mail.

"Okay, a tech assistant will be in in a moment to give the shots. Do you have any other questions?"

"What age should I get him neutered?"

"With a Lab, I usually recommend two years or when they stop growing."

"Okay. I'm training him to be a service dog, would waiting that long interfere with that?"

"No. It may actually be better behavior-wise. The only reason you should have him fixed before then is if he starts acting inappropriately around other dogs."

"Okay, thanks," Jay says as the vet opens the door for the tech assistant to come in.

"If you don't have any more questions," the vet motions to the door.

"No, I'm good," Jay replies before Dr. Richardson leaves the examine room.

Jay holds Casper still as he is given the four shots, "I'm sorry, boy," Jay whispers to the puppy.

"All done," the tech announces.

Jay goes to the front desk to pay before taking Casper outside where the dog is now happy that they are leaving. "C'mon, let's go home. I think you earned some extra treats tonight," Jay tells Casper.

Arriving at his apartment, Jay sees that Hailey is waiting in her car for them. "How did it go?" Hailey asks when she gets out of her car after seeing the two of them.

"It was good," Jay answers as they walking into the apartment building. "He was scared, but the appointment went well. He's a bit underweight and he's probably always going to be small, but he's healthy."

"That's good. Is it going to bother you?" Hailey asks. "That he's going to be small?" Hailey clarifies when she sees Jay's confused look.

"No. I just want him to be healthy," Jay tells her as he gives Casper his food.

The two partners watch the sports highlights from the afternoon games before Casper joins them, settling at Jay's feet, once finishing his food. Hailey leaves once reruns of the highlights start playing, leaving the two to relax after the trip to the vet.