My 6 pound chihuahua got chemical burned from Sargents. My mom applied flea “medication” on to him and within a few hours we seen what looked like a bald spot with blood, so we took a closer look and it was bleeding and extremely raw. Nothing we put on it helped & I have some experience with chemical burn so I knew that that was what he got. He would scream if you even touched near it. All he wanted to do was lay in his crate, he didn’t wanna be touched, he didn’t want to drink, & he didn’t want to eat for 2 days. I had washed off all the flea medicine off by giving him a bath and I also had to put a cone on him so he couldn’t bite on it anymore & continue to make himself bleed. He just today after 2 days of barely moving has been acting somewhat normal.