Here is how to make and use a food tube. Great for people who don’t like to handle messy treats. And useful for behaviour modification cases and reactive dogs. Or with gloves on cold days! Or mobility dogs. Canned tripe is one thing I forgot on the list and consistency is key to success. Not too thick, not too runny. Play with it by combining different foods. (like I suggested with cream cheese/yogurt combo)
Here is a link by Eileen Anderson for more tips.