This is related to the first chapter. Werewolf!Tony.

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Tony hadn't planned on showing any of the Avengers his 'furry self' at any point in the near future. They hadn't earned the right. None of them had.

Or, Tony had thought that to be true. Then a month after the New York battle a General Ross had tried to take Bruce with the intentions to experiment on and kill him. Tony hadn't liked the General on sight and he had caused the hackles on Tony's wolf to raise, but when he went after Bruce Tony's wolf had snarled long and loud in his head. Ross smelled like dust and mothballs and had the smell of anger and a sickness that was all in the man's head and Tony loathed that he had to allow the General in his space, but it had to be done to stop the man from being able to touch Bruce ever again.

Ross wouldn't discover till later that Tony had only allowed the man into his tower to deliver a warning "Stay away from Bruce. Stay away from me. Stay away from the Avengers."

"And if I don't?"

Tony had smirked at the General. "I am Tony Stark."

The General had scoffed and proceeded to seal his fate and manage to push Tony to the edge of a transformation when he listed all the reasons he believed justified his right to take Bruce and kill him after making him a lab rat. Tony had growled out in a voice verging on an angry nonhuman snarl "Get out of my tower." Ross had gotten up and left, but before he made it out the door Tony had hacked into his files and leaked information and proof that General Ross was unfit for his place in the army, froze most of his accounts and bugged his phones.

After that he had stalked out of the room he was in, attempting to push the wolf down so he wouldn't transform out in the middle of the tower. He could feel his body trying to force a change in his growing anger, and he drew in deep breaths in an attempt to stop it from happening. He was so focused on not wolfing-out that he actually crashed into Bruce and knocked him over.

"Sorry Bruce." He reached down and easily lifted the man off the floor and onto his feet.

"Tony?"

Tony's eyes focused immediately on Bruce when he noticed that the voice was off and upon taking a deep breath he noticed the strong scent of fear had weaved its way into Bruce's scent. "What happened?" his voice had verged on a low growl as he tried to figure out what had caused Bruce's fear.

"W-Why was General Ross here Tony?"

As soon as Tony realized that Ross was the cause of the fear in Bruce's voice the wolf in him had reared sharply and his anger spiked so much he actually staggered into the hallway wall in an attempt to stop his anger-triggered transformation. "Tony?!" worry worked into Bruce's scent as he stepped forward and reached towards Tony.

Tony stepped back his voice mostly growl as he told Bruce "I took care of it Bruce. He won't ever touch you again." And then he staggered back into his meeting room commanding JARVIS to lockdown the door and let no one inside. Bruce managed to get inside before JARVIS obeyed the command having followed after Tony instantly.

It was for that reason that Bruce was the first Avenger to see his change as he shifted as soon as the door shut. Bruce had gasped sharply and Tony had turned his now gold eyes on him straightening out of his doubled over position to his full 6 foot 5 inches of height. "Tony…?" Bruce's voice was soft and wispy in his surprise.

Tony had taken a deep breath but despite the shock he could smell there was no fear in Bruce's scent. He stepped forward pausing momentarily as he heard Bruce's small gasp. He then changed his mind and lowered himself into a sitting position and he stared at Bruce.

Bruce had stared for a minute before he moved across the room in slow careful steps. He paused in front of Tony, who stared into Bruce's eyes, his anger bleeding away to be replaced with amusement at Bruce's reaction. He knew it showed in his gold eyes when Bruce scoffed softly "Damn Tony. You could have said something earlier."

By that point Tony was calm enough to shift back and he did so, sighing softly. "The only person to know about this is Pepper Bruce."

"Oh. How long have you…?"

"Since I was sixteen." Tony smirked at Bruce "I told you once before that you needed to strut when you were tiptoeing. It was personal experience speaking. You can't treat your other half like it should be suppressed. It will always be a part of you. So you learn to work with it, what sets it off, what causes it to react that way it does, why, how does it think? Once you've learned that, you know how to work with what you have. If you suppress it, the blow up will be so much worse than it should have been."

Bruce's eyes widened before he murmured "It's not the same."

"Sure it is. Hulk is your instincts Bruce. Or he is instinct driven. Hulk only shows up when you're angry or emotional, when you're in pain. He reacts to these things with instinct. Since you repress him most of the time instead of occasionally letting him out to vent when your emotions are not peaking usually due to some kind of pain or anger he is harder to…well control. Or direct. Because technically he is you. Just like my wolf is me. They are both just baser versions of us that operate on instinct rather than Society's ethics. It doesn't make my wolf or the Hulk evil. Just instinct driven. So Hulk should react as my wolf does. As long as I shift regularly and run or something like that, let my wolf have some freedom for a while, my wolf lets my more human notions guide him along with the instincts. It's when I haven't changed it a while, when the wolf has been shoved into the back of my mind for a long while and become antsy and agitated, or when a highly emotional response forces a change that I respond as my wolf. When everything is instinct rather than a thought out response. The Hulk should work the same way."

Bruce opened his mouth before closing it without a word as he thought about it. Tony grinned a bit before adding "Do me a favor Bruce?" he waited for Bruce to look at him and focus "Don't say anything about this?" Bruce stared before he nodded once, slowly.

"Alright Tony."

It was only later that night, that Tony realized exactly what the wolf's response to threats aimed at Bruce actually meant. When Tony realized that technically speaking the change had been triggered by anger, and therefore it was mostly his wolf in control until he had become amused, it was his wolf that had sat down and waited for Bruce to approach rather than busting out a wall to escape, or growling.

His wolf had accepted Bruce as pack and Tony wasn't even sure exactly when it had happened. Bruce had become someone his wolf would protect from anything that meant him harm. Someone that Tony, down to the deepest parts of his mind where all that mattered was survival, where everything ran on instinct Bruce was someone he trusted and cherished. He was family.

Pack.

Tony had gone still as his eyes widened and his mind absorbed what his wolf had known for a while. "Oh."

Well then.

Next time he shifted he would need to get Pepper and Bruce to join him.

It was a comfort thing to his wolf that at some point each month he needed to shift and have his pack present. Frankly the wolf would prefer that his pack was always there, but Tony was realistic enough to know that wouldn't happen, so he had compromised. He knew his wolf needed his pack there with him at least once a month or it became…agitated and restless.

Wolf's were social creatures. Tony had read up on the animals in an attempt to understand how his wolf operated when he first found out what he was. Wolves had a certain amount of time set aside for bonding with pack mates. It was instinct to lie-down together and rest, or groom one another, to play together and after an time of absence from the pack wolves would greet each other enthusiastically upon the return. Even pack mates who left the pack for another or left to create their own were greeted enthusiastically by old pack mates when they visited.

Tony's wolf worked the same way. The wolf needed a time set aside each month to check on his pack, to make sure everything was alright with them and to just…bond together as a pack. Since Bruce was new to his pack, and now that Tony was consciously aware of it, the very next time he shifted for any length of time that didn't involve life threatening issues his wolf would want to have Bruce be present with Pepper.

He wondered when Bruce would be free at the same time as Pepper and himself. He shook the thought off after a moment. Pepper and Bruce basically worked for him considering Tony had offered Bruce a place in his R&D department and Pepper ran his company. He could shift schedules around if he needed too.

Having settled that, Tony went back to the new arrows he was making for Clint. They had acid in the arrowhead that would activate upon hitting their target and eat through just about anything.

He would set up a Pack Night when he was done.