My Shizu - Peeing and Skin Irritation

Question
I have a 4 year old shizu. She has been potty trained from a little puppy.  Just in the last 3 or 4 months, she has started going to my oldest sons bed and peeing on it.  This has happened in the past every once in a while.  Recently it has got worse.  If his door is shut she has went on one of the other kids beds once or twice, but is is mainly the one bed.  She is kenneled up during the day in a fairly large kennel.  From appox. 3pm until 7AM she is out of her kennel.  She goes to the door when she needs to go out.  If we gate the upstairs she does not pee in the house anywhere.  She sleeps in my bedroom all night and never pees.  I do not know what to do to stop her from doing this.  Can you help.

She also has the red itchy skin.  I have tried baths every two days this helps, and allergy shots from the vet, We have her on Natures receipe vegitarian and venicin food.  We used to do sensitive skin but found out we need to do away with the corn in her food.  Can you help here also?

Answer
Hello Sorry about that I clicked the wrong button first, I Can not help with the sudden peeing in beds but about the allergies you can give *25 mil Benadryl caplets(there oblong shaped pink pills in pink and white bottles/boxes) from any drug store, 1 in the mornnig or 1 before bed should calm any itchiness or scratching...I give my Jack Russell Terreir one a day and it seems to calm his itchiness quite a bit. THe vet i use reccomended these to me last year when both my dogs had outbreaks.