Well, I'll give you my opinion for what it's worth .....
I wouldn't feed beggin strips. They are full of dyes, fillers, sugar, salt, etc. No meat. I would think they would cause a tummy ache for sure.
I like ZUKES brand of treats. I also am a huge fan of konas chips which are 100% USA chicken strips that are dried. (Be careful if you buy other brands as many come from China). The website for konas chips is here: www.konaschips.com
For chewing, I really like the odorless bully sticks I ordered from bestbullysticks.com. I talk about them in the chat section if you want to read more. But yes - they are good! I always get the 6 inch ones, they seem to the be the perfect size. Brody is a hard chewer, but they last a LONG time and I've never had any stomach issues with them.
I like Marie's idea of making treats. Then you know exactly what is in them. With all the pet food and treat recalls, this is a very smart thing to do.