There are many shampoos on the market designed to help reduce dog hair fall. Here are some examples: 

1. Furminator deShedding Ultra Premium Shampoo: This shampoo is designed to reduce shedding by promoting healthy skin and coat. It contains omega-3 and omega-6 fatty acids, papaya leaf extract, and calendula extract.
2. Earthbath Shed Control Shampoo: This shampoo is formulated with natural ingredients like aloe vera, shea butter, and omega-6 fatty acids to help reduce shedding and promote a healthy coat.
3. Burt’s Bees for Dogs Natural Shed Control Shampoo: This shampoo contains omega-3 fatty acids, vitamin E, and other natural ingredients to help reduce shedding and promote a healthy coat.
4. TropiClean Lime & Cocoa Butter Shed Control Shampoo: This shampoo contains omega-3 and omega-6 fatty acids, lime extract, and cocoa butter to help reduce shedding and promote a healthy coat.

To use these Dog shampoos, follow these steps:

• Wet your dog thoroughly with warm water.
• Apply a generous amount of shampoo to your dog’s coat and work it into a lather.
• Massage the shampoo into your dog’s skin and coat for a few minutes, making sure to get all areas.
• Rinse your dog thoroughly with warm water, making sure to remove all the shampoo.
• Towel dry your dog, and then brush or comb your dog’s coat to remove any loose hair.

It’s important to note that while these shampoos can help reduce shedding, they won’t completely stop it. Regular grooming, such as brushing and combing, is also important to help control shedding. Additionally, if your dog is shedding excessively, it’s important to talk to your veterinarian to rule out any underlying health issues.