I applied this flea medication to 4 indoor cats 3 hours ago. My children just came running to me saying our youngest cat (5 yo) is hyperventilating. Her body feels hot. I quickly grabbed a bucket of soapy water and washed the area hoping to remove whatever remains of the medication. Now I am praying she will be ok. I am monitoring my other older cats. This is the first time I've used this brand, purchased from my vet. Extremely worried!!