It may be too late but they say if you actually let the other animals see the deceased it helps.

Some animals grieve in different ways. I have heard of animals healing faster by keeping them busy. It helps take their mind of it.
Some animals actually heal faster by being comforted by familiar items from the deceased pet, a favorite toy & bed.

From my personal experience the first seems to work best so far.
You can try to keep her busy so her mind is not on missing her buddie. A couple extra short walks a day, extra pets & love. Enroll in an obedience class. Anything to keep her mind off of her buddy.

I am sorry for your loss of Jasmine & the best of luck to you & your lonesome Sandy. Just be patient & understanding.