Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (91.99 USD): BG8OFFCOUPON
Coupon (93.99 USD): BG00c906
(CouponsFromChina.com tip: you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGpetYJ06, ADMITAD2212, 2022ACTIESNL, Terence, Tabby20, 2203ActiesNL, BG1efeb0, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BG58e9cf, hoNEYbGdeAlS, BGJUNEGSG9, BG8ReviTrage, Cuponation9, COUPONSDE1wk, BgGoodie9, BGcoupon8off, BGGutscheine
(there’s a little possibility that old coupon will work)
Price history and price alert
Price history (for all/most countries) for Dogness 6L Intelligent Pet Feeder is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).