Provide your dog with things 'to do' when you are away. Exercising your dog's mind has many benefits. It can help decrease anxiety, enrich their life, and provide them with opportunities to engage in normal dog behaviours.
Fill a Kong-type toy with food and give it to them before you leave. Try to fill the toy with food that will take your dog 20 to 30 minutes to eat. This often distracts them long enough to prevent anxiety from building up.
Tip: Try freezing the Kong and food before giving it to them. This will lengthen the time your dog is occupied. You can also try hiding your dog’s food so they have to find it which can help engage and preoccupy them.