Diy Bitter Spray For Dogs . The downside of doing diy is the unknown dangers if things are done incorrectly. Mix half a cup of citronella oil with 4 cups of water. DIY Bitter Spray pets Dog deterrent spray, Pet health, Dog deterrent from www.pinterest.com You may be wondering what the purpose of it is. First, create a mixture of acv and water using a 1:1 ratio. If you want a spray that is more pleasant for you to smell but will.