Hello. You can use any non medicated shampoo+conditioner. Here are some links Hey, check out Wahl Oatmeal Shampoo for Dogs - Coconut Lime Verbena on Kuddle
https://kuddle.pet/product/wahl-oatmeal-shampoo-for-dogs-coconut-lime-verbena-87wp
Hey, check out WAHL Four In One Dog Shampoo & Conditioner - Lavender Chamomile on Kuddle
https://kuddle.pet/product/wahl-four-in-one-dog-shampoo-n-conditioner-lavender-chamomile-iikz
Hi Swathi. You can try brushing your pets teeth. Use any dog toothpaste/ cold pressed extra virgin coconut oil with a dog toothbrush for the same. Give him chew sticks. If you are finding lot of tartar, I would suggest you to get it cleaned from a vet. If nothing works, get CBC and KFT done.