@henshaw49What type of dog pack are you using? Do you know the brand? I have two ideas you may want to try. One, contact the company and see if they have any extender type clips that work specifically with their products. It's worth a try to have something that will work easily with your existing pack. Second, what if you were to give your dog a shave around the waist area to gain a couple extra inches? I wouldn't shave anywhere the straps would rub like under the armpits, but just around the waist it might work. Plus it'll give Fido a cool summer do as well.