I am my dog's secretary

My dog got mail yesterday.

 It was from Petsmart (where we adopted him several years ago).  It was a coupon for doggie treats.  It even included a code that could be used online.

The day before, my dog got a voicemail message from his vet.

 "Hi, Chewy!  This is Dr. __________.  Just wanted to let you know your tests all came back fine.  You were such a good boy for us!  But you need to lose some weight.  Tell your mommie to get you off the Beneful.  Beneful bad.  Be a good boy!  Any questions, give us a call."

 You know, this concerns me.  He is home alone all day.  He has access to my credit card statements.  I'm afraid one day I might come home and find him watching Home Shopping Network buying gadgets we don't need because they are on sale.  Or worse, find him on the internet looking at...well...whatever dogs look at on the internet.