[Help] Other dogs acting differently after losing one of the pack

I had 3 dogs and one of them died unexpectedly on Sunday. He was the "pack leader" behind me and the loss has changed the dynamic of my other dogs, especially my older female pit bull who seemed to really look to him as the leader and playmate. She's now staying very close to me and is no longer as active because she doesn't have anyone to rough house with. My other dog is a jack russell and doesn't play with her or interact the same.I'm worried the change will start to effect her health as well and I'm wondering if it would be good to get a pup so she can have someone to play with or if that would make things worse by not allowing her to have as much attention.Thanks for any advice. via /r/dogs http://ift.tt/2s4Bc06