Making process, but stuck on jealousy

Well, Dewy is coming around lovely when we're out for walks. He tolerates the pup really well out in the yard, even almost playing with him :p
But when we're in the house the growling and showing teeth starts up again.

I'm the primary care giver to all. I am a Stay at Home mom, so I'm with these guys 24/7. Dewy has always been a Mama's boy. I mean, ridiculously so almost, this dog is attached to my hip more or less. Red is starting to turn into a Mama's boy. lol He's always wanting to sit by me, etc.
So I believe Dew is having some jealousy issues. :rolleyes: I can sympathize, Over his life he had to adjust to two kids coming in to share attention with him, and now a pup. But I also want to do something about it, cause frankly, with 3 dogs, they're gonna have to share me.

I'm trying to figure out the best approach to stop jealousy, but still reassure Dew that he's still loved. It'll be nothing but beneficial, because when we have company (meaning people that are close to the family and the dogs know very well and love) they (meaning Dew and Lola) constantly push one another out of the way for pets. So it's about due time that something is being done about the jealousy in this house. Before I would just send the "culprit" to go lay down. Doesn't seem to work.

Any suggestions how to stop this behavior without creating further issues?

You are the leader. As the leader, you control all the resources. Attention and love is a resource (obviously, a very valuable one to Dewy).

Instead of Dewy freely grabbing your attention, you make him earn your attention. There is no hogging of attention, either. If one dog starts to act out of line by hogging your attention and/or acting jealous, walk away from that dog. S/he has to learn that YOU control your own attention, not him/her.

This doesn't mean you can't love on them and give them belly rubs and pets. It just means that YOU initiate it all and YOU end it all. So YOU rub Dewy's belly when you want to. You end it when you want to. If Dewy is leaning against you and jumping into your lap, get up and walk away from him. This is something called NILIF, or Nothing In Life Is Free: http://k9deb.com/nilif.htm