Our dog Jack is a two year old, 15 pound terrier mix with a sensitive tummy. We have to be very careful about the type of treats he gets as well as how much, or stomach problems will occur. My husband bought these treats as a Christmas surprise for Jack and he just loves them! He purchased the Digest-eeze Rawhide Twists with Pork and Beef. I was somewhat hesitant to feed them to the dog at first because other rawhide treats have upset his stomach. Jack experienced no problems at all with these rawhide treats. He was very excited when he smelled the open package and had a nice chewy that lasted for quite a while. After the first one, he would jump around like crazy when he heard the bag open knowing what was coming. Being a terrier mix, he loves to chew on things and these treats satisfy that need to chew (better treats than my shoes!). These treats are the perfect size for him as well, since he is on the smaller size. I would definitely recommend these treats for anyone with a dog that likes to chew, as well as any dog with a sensitive stomach.