PASSIVE AGRESSIVE EMPLOYEE

We show dogs, and therefore raise them. I have a kennel lady who has been here 5 years, and we have been very close. Lately she has done more and more passive aggressive things. Example-one female we have has 6 puppies of her own, and 2 from another litter. Therefore she has to eat an enormous amount of food and always have water. I have this all specified on a card by her area. This employee gives her one bowl of food, no puppy food dry that we always keep with mothers, and rarely fills her water bowl. She also "puts things away" so that no one could ever find them. I have a number of specific vaccuum attachments, they end up anywhere, as long as they are behind a door or cabiniet. She has stopped keeping me a list of what we need to buy. She leaves after her shift with no formula made, none of the home made food we use for the geriatric dogs, none of the mixture we use to give pills. This alone takes me over an hour to do before I can start my shift. It seems every week she stops doing another thing she used to do automatically.
I think she thinks she is indespensible. She will arrange to stay once a year for 10 days while we go to a National Specialty.
I have hired a new lady to cover the shifts when this other lady is off. I won't let her orient the new lady, and I told her the reason is I don't want to have a new employee see her do her work with the cell phone on her ear. She says she has to stay in touch with her [large] family because she is here so much, but she works a lot of hours due to her bills. Thanks! SusanLauer