I am wondering about this product-the original one that must be refrigarated. My puppy is 5 months old and her staining appeared out of nowhere a month ago, while I realise it may due to teething, I do not like how it looks; like she is crying bloody tears. So can anyone tell me about their own experience with this product; how long it takes to work, how often it must be use, daily, more than once a day etc. Thanks so much, I love this forum!