First step is to source a pair of jeans from your local Salvation Army Thrift Store. These can be in any shape since we’re creating a dog toy that will hopefully be well-loved by your puppy. You could find a pair of jeans that you can repurpose into cut off shorts then use the legs for your DIY toy.
Next wash the jeans then cut the legs off. I would use the full leg since we’ll be braiding the denim and you want to have a lot of length to work with.