Q1: What kind of hair type does this brush best for? Dipoo self cleaning shedding brush is best for dogs and cats with medium short and medium long hair. Q2: Does it work for my Pitbull with very short hair? The bristles may not catch the loosen hair of a pitbull well. This brush is also not suitable for other dogs and cats with very short hair, like Pitbull, Dogo Argentino, Tabby, American Shorthair. Q3: Does it work for my Ragdoll with very long hair? The brush is suitable for pets with very long hair only if the pets have a fine coat, the bristles may bend if the long hair is tangled. Q4: Does it work for the pets with thick coat? Be careful that the bristles may bend when using it for the pets with thick coat. Q5: Does it work for dematting or detangling? The brush is not suitable for dematting or detangling.