its not really that they can swell up, but its more that they can bit off big pieces of it or they can swallow the rawhide when it gets to be a small size. dogs can choke on it or it can get lodged in their intestines. that's really why you need to supervise them when they have chewy like rawhide and take away any pieces that they break off and take away the rawhide when it gets too small. i recommed getting bully sticks instead. they don't get gooey like rawhide |