So you have the shakes for breakfast & lunch then a dinner (bit like slim fast?) I may be wrong but I can't see how the tablets would work with that unless you're having a high fat tea. I'm sure there's someone here who knows better than me though....
And omg have to say your puppy dog is adorable!!!!
Xenical will get rif of all fats, it doesn't the difference between good and bad fats. If you're using the shakes for non medical reasons ans you're following a healthy plan and getting enough cals then I'd take the tablets with them.
If you're using the shakes and eating very little then I wouldn't as the shakes are nutritionally balanced and you'll need those essential fats.