Dog with seperation anxiety

Question
Hi, a while back I wrote to you re. my dog Nina,a Tibetan Terrier, who I adopted 3 years ago. She is about 9-10, not quite sure of her exact age since she had 2 families previous to me. After a 10 day vacation and leaving her at a kennel, she started acting destructive. Chewed the blinds to shreds, peed inside, tried getting up on the table etc. We took your advise and limited her space when we are gone. she is in the hall and we close all doors except the bathroom, where we have put her bed ( she also has a bed in the hall).she has to "earn" everything now, food etc. When we leave we don't make a big deal of it, nor when we come home. We also don't let her out of her space right away (although she can see us since we have a gate up). we also give her a bone stuffed with peanut butter when we leave and the radio is playing. She is definitely barking less when we come home and leave, and listening to our commands, but she is still peeing inside when we are not there. Mainly in the bathroom. I know it's not because she has to go, because we can be home all day and she is fine.How do we get her to stop going inside when we are not there?

Answer
Your dog may have lost her house training skill as a result of the separation issue.  Go back to square one: TAKE her out, reward/praise every urination, keep her out long enough for her to eliminate (if you take her out for walks, use another door, not the one chosen to bring her outdoors for elimination).  Since her separation issues have diminished, back off on the NILIF and see what happens.  Ask her to earn food, going in/out of doorways to the outdoors, treats and special toys, but go back to free attention and see what happens.  NILIF is intended for short term use except in situations where dogs are hugely out of control or actively aggressive.  Her choice of urinating in the bathroom may be driven by the smell of urine itself, which dogs can distinguish no matter how well we clean.  Don't use chlorine when you clean the bathroom floor.  If the dog appears to clearly have gotten the idea that urinating outdoors is rewarding, and is doing it routinely and without hesitation and she's still urinating indoors, veterinarian visit is required.  This is not a young dog and cognitive dysfunction or incontinence are not uncommon as dogs age.