New Doggie problems. Please help?

Casey is older and is probably not in the mood for Troy's young and boisterous attitude. However, they can totally co-habitate together, you just have to act as the mediator.

The dogs should never be left together unsupervised. Not for at least the first month, maybe even longer. Pack dynamics are still being sorted out, and with you gone, they will resort to challenging one another for status. Confine Troy to the bathroom or another part of the house when you leave.

Casey needs to be fed before Troy, allowed to walk through the door before Troy, allowed to get in the car before Troy, given treats before Troy, get her leash put on before Troy, etc. This makes it very clear to both dogs where they are in the order.

It sounds like Troy is very content being the Beta, most males are with an older female around. Encourage that role for him by giving Casey things first. Don't give Casey more of anything, she just gets it before he does.

Of course Casey is annoyed, she now has to share her home with a rambunctious oaf. They will both acclimate and will be fine if you fulfill your obligation as mediator.

It takes a new dog 6 MONTHS to fully adjust to its new environment, and that same goes for the resident dog who much adjust as well. If you get rid of either of these dogs before that time period, then you have no business bringing another one into your home. Ever. I'm sorry if I'm being rude, but I'm so tired of people getting rid of their dog because it "doesn't get along" with the other one. It takes time and effort.

The first thing you ever do when getting a new dog is INTRODUCE THE NEW DOG SLOWLY to help the both of them adjust.

Never show one dog something and not the other.

you need to go slow with the new dog so nothing happens like a fight.

Even though you just got Troy, he needs to be slowly introduced to Casey and Casey to Troy.

The reason is to help both of them adjust.

This is all new for the both of them and Casey could when she snaps hurt Troy and you do not need that.

No dog whether new or old should snap as that is bad behavior and you being the pack leader must control the whole thing here.

Never let either one of them try anything even if one of them is calm.

So go slowly with both of them and remove them if one of them shows signs of stress like tail under legs, hair standing up, drooling, hair shedding , backing up as these are signs of stress that can hurt one or both of the dogs.

So even feeding and sleeping need to be done slowly and do not let the new dog near your room and keep both of them away from each other till you are awake and slowly start again tomorrow and make sure they eat separately just to be safe and give Troy time to adjust and that can take 2 weeks.or more

You just got the dog yesterday, give them some time to get used to each other!

wow, get rid of all your dogs!