The pet shop I used to work for sold these and dog's just LOVE them. I also trust the buyer of that shop whole heartedly with only buying the best of the best to sell to pet owners.
I understand your concern about the fat content, but these are pretty healthy, though I wouldn't give little pieces more then 1-2 times a day for our little ones. I suggest contacting the company with your question as they should be able to give more in depth info on the implications of these treats in your pet's diet.
Oh and
good job with concern regarding fat content
1 in 5 American dogs are obese, shortening life spans, causing bone and joint issues, cardiac disease among other horrors.
Great treats without a fat content worry are Halo Liv' A Little's. DOgs LOVE the chicken. Good Luck and if you do contact Plato, be sure to tell us what they say!