My 18 month old male shepherd has taken on a new attitude that has me both perplexed and frustrated. We brought our new dog home at the end of October and were careful to feed the dogs separately. We made it a point to give Hairy more attention than we usually did after Heidi came. I must tell you that both dogs get along very well it just that when they are both in the house, Hairy acts angry and refuses to obey commands. Lately, he has begun growling at me to the point where if I just walk past him he does it and slinks away. I've tried giving him extra attention and loves, play time with just me, ignoring him or disciplining him to a corner to no avail. Hitting the dog is not an option because I don't know if that is a correct method and don't want to make it worse than it is already.
I do give the female attention and have been more so lately because of training as she is an indoor dog and need her to be obedient. Hairy goes outside when I do this but this seems to piss him off more.
I guess what bothers me is that he doesn't do this with my husband, even with the pup in the house following him around. My question is, what am I doing that is causing Hairy to be so mad and what can I do to correct this behavior?

First off, take a step back - you're attributing human motivations to your dogs behaviors, which is not the case here.

I'll add I've not had this problem before we brought another dog into the household nor have I had any difficulty getting him to obey my commands. His behavior has changed since bringing Heidi home so your statement has me a little baffled.
Please tell me more. In your opinion in what I have described here, what do you see and are there any other details you need?

Introducing a new dog into a household changes the pack dynamics. This is a classic occurrence. Both dogs must now see where they fit into the pack, and where their rank is.
The male dog isn't mad, he's likely frustrated and confused about his current rank. And it sounds like he's starting to try out little displays of dominance towards you.
You as the owner play the biggest part regarding pack dynamics, and most people really don't understand it well.

With the dog starting to growl at you, you're at a point where you may start to see an increase in displays of dominance, which can escalate into a situation that nobody would want to deal with. Ed has some articles about laying the ground work for an owner being the pack leader, and an article about introducing dogs to an existing dog household. I've posted the links below, have a gander at them and see if they give you a more clear picture of what may be going on in your household.

http://www.leerburg.com/groundwork.htm
http://www.leerburg.com/introducingdogs.htm

Just reading these articles have shown me the glaring mistakes we've made. Time to break out the crates again and get a prong collar for Hairy. It all makes sense. Looks as though Eds DVD couldn't have gotten here at a better time (came last night and watched half). Other half will be watched today.
Thank you, thank you, thank you!!

You're welcome and good luck! <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />