Some of them just never do. My Tiah has long enough hair, but I don't feel it would ever drag on the floor. Your avatar pictures are adorable, but it doesn't look like Daisy will ever have a very long coat. I could be wrong though. I had a male some time back who looked a lot like that and it took over 2 years to seem to finally start getting a little actual lenght to it. What are you feeding her? A good diet and shampoo do help. Also, you may want to ask your vet about a good vitamin. You can get "Brewers Yeast with Garlic" at WalMart and it is good for the skin and coat and tends to keep the fleas off. That is what I use. Daisy looks like she brings you much love and joy
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