Try
this link for lots of doggie yums.
I've only made the Peanut Butter Puppy Poppers so far, but Annie adores them! I use wholewheat flour and sometimes add mashed banana or honey too.
Another link is
this one. I've made the Cheese and Garlic Biscuits - I just left out the beef fat - and Annie goes mad for them. And I've been known to scoff a few myself when they first come out of the oven!!

You really can play around with the recipes though - add beef instead of chicken, cheese instead of peanut butter, pilchards, liver, oats, honey, whatever. Have fun and experiment - your doglet won't complain!
I try to keep them healthy so I always use wholewheat flour and I always try to be mindful of salt (add none) and not too much fat - other than that, just play around!
Edited to add that I even managed to find a tiny bone-shaped pastry cutter in a little cake/party shop which is just fab for the biccies! Also got a rabbit shaped one (

), a loveheart and a star