From experience and hard data, I'm going to put soap nuts in order to olives when considering human sensitivity to the whole bunch. Do you notice that your dog is "wiping" his eyes on his foreleg or have you noticed that his sight seems to worse? https://Tieuhocvanchuong.edu.vn/index.php?language=vi&nv=statistics&nvvithemever=t&nv_redirect=aHR0cHM6Ly9qdXN0cGFzdGUuaXQvYnV5dGhlcmFsaWZlZXllcHJvZHVjdHNmb3Jyb3NhY2U