Try to desensitize him to you leaving. You can do this by getting ready to leave the house, stepping out the door for 10 seconds, then immediately returning. Gradually increase...
Yikes! I would put antiperspirant spray on it so it won't burn. Lead the licking dog to another room so it will be distracted when you spray it on. Just...
You will have to teach your dog a come/return command in this case until he is very reliable. Practice this command over and over in an area without squirrels to...