BOURBONNAIS, Ill. — Ten things you need to know from Friday’s practice at Olivet Nazarene University:

1. The players are making physicality a point of a emphasis this season and it led to the first dust up in training camp Friday. After running back Jazquizz Rodgers was stopped near the line of scrimmage, defensive end Jarvis Jenkins took a little bit of an extra shot and right guard Kyle Long took exception. It was a heated exchanged that included a few haymakers, but nothing major transpired. The two sides quickly calmed down and moved right on to the next play.

“You try to discourage it but I’m sure this won’t be the last one, I can pretty much guarantee that,” head coach John Fox said about the incident. “But it’s a combative game played by combative people and you just do your best to keep our guys healthy.”

It is interesting to compare Fox’s reaction to the way Marc Trestman handled these common training camp dust ups, which was to try to eliminate them all together. In fact, Trestman ended practice early last year after tight end Martellus Bennett threw cornerback Kyle Fuller to the ground.

Fox certainly doesn’t want to see anyone get hurt, but he’s well aware that a lack of physicality was a common theme during the Trestman era and the Bears want to cure that problem early in camp.

The interesting thing about Friday’s incident? The pads weren’t even on yet. Get ready for more fireworks this weekend when the pads come out.

2. New linebacker Pernell McPhee is bringing the right attitude to the Bears’ defense.

“I know what time it is. It’s time to be a dog and every play I’ve got to be one,” he said.

When asked back in March what he brings to the defense, he simply said: “Violence.” He continued that theme while talking to reporters Friday.

“I think that’s what we’re going to do this year, is put fear in the other team’s offense,” he said. “When they see us come out there they’re going to be like, ‘Woah, these guys are playing, everybody’s flying to the ball, everybody is being very aggressive.’ Me and the guys are talking like, hey, we need to be the aggressors, we need to be the attackers, not the ones being attacked. That’s our mindset right now. That’s what we’re working toward.”

You can be sure McPhee is one of the most excited to take the field in pads this weekend.

“That’s going to really show who’s got the dog in them and who don’t,” McPhee said. “That’s what it boils down to at the end of the day on defense — who’s got the dog in them and who is going to be physical and violent.”

Fox will let the dogs out Saturday at 9:35 a.m. at ONU.

3. Rookie nose tackle Eddie Goldman left practice early Friday after suffering from dehydration. It’s the second time that has happened since he was drafted this spring as Goldman also left the first practice of rookie minicamp for the same reason.

4. Cornerback Kyle Fuller was limited in practice Friday after “tweaking his ankle,” according to Fox.

“I don’t know the extent of it,” Fox said. “But we did back off of him some in the late part of practice.”

5. Tight end Dante Rosario was excused from practice for personal reasons.

6. Wide receiver Eddie Royal made the catch of camp so far when he jumped up over cornerback Tim Jennings and high-pointed a deep pass from Jay Cutler.

“I just went up and got the ball,” Royal said after practice. “I don’t know how high I was. A couple of the guys said I was pretty high up there. I don’t know, I’ve got to see the tape.”

7. Tim Jennings expects to stick at the slot corner position this year. Last year he spent training camp and the preseason in the slot, but after Charles Tillman went down in Week 2, he was forced to move back outside where he was more comfortable. Now in Vic Fangio’s scheme, and away from the old Cover 2 concepts, he’s embracing playing inside.

“With the defense we’ll be running now, it fits well to what I’m trying to do, what they’ll want me to do. Have guys on the outside that contribute well, get the right guys in place,” he said.

With the secondary matching more routes in Fangio’s scheme, Jennings is hoping it leads to more game-changing plays.

“It’s more man on man. Mano-e-mano,” he said. “So you have to be more aggressive and buy some time for our D-line and our linebackers to get some pressure. Hopefully we create a lot more turnovers.”

8. Willie Young is in a tough spot trying to learn a new position while coming off a torn Achilles. It has left him with no work within the defense during practices, although he’s hoping to get involved soon.

“I don’t know anything about playing linebacker so obviously I study day-in and da- out now,” Young said. “It’s never a day off. Being in a 4-3, I can make strength calls left and right with my eyes closed. But now it’s different. Now you’ve got different things to worry about, gotta consider different aspects of the game.”

Unfortunately the instincts can’t be developed until Young actually gets out there. Considering he’s in the middle of a wide open battle for playing time, the sooner the better.

9. Jay Cutler had some fun in practice Friday at his position coach’s expense. While quarterback coach Dowell Loggains was throwing bean bags at the QBs during a footwork drill, Cutler decided to catch one and fire it right back at him. Loggains was able to dodge the beanbag, while the crowd laughed.

10. The Bears’ roster is back at the maximum 90 players after they added offensive guard Tyler Moore after practice Friday. Moore went undrafted out of Florida and spent time playing with the Tampa Bay Storm of the Arena Football League this summer.

Adam Hoge covers the Chicago Bears for WGN Radio and WGNRadio.com. He also co-hosts The Beat, weekends on 720 WGN. Follow him on Twitter at @AdamHoge.