Shave Instead of Brush.
Heidi, my miniature schnauzer, went in for a "full groom". I guess "full groom" means shave all their hair off including the beard. Horrible. I think a chihuahua has more coat than my poor Heidi. They said it was matted. If she was matted that bad, you should call the owner BEFORE you take drastic measures - I would have brought her home and used a groomer with patience. No more pet paradise for me.