New doggie very skittish. How do I help her?

My dog is 15 and has been having health problems since her recovery from a toad poisoning. I use lavendar essential oil at night and sandalwood during the day for her. It seems to calm her, and the lavendar puts her to sleep.

I put it in a burner near her bed, so she can walk away if the scent bothers her. If I had a cat, I would be afraid she'd knock the oil burner over, though.

I hope your animals get along well soon! :)