she acts strangely beforehand, when she sees it, but once it's on, she slinks around, has her head down, tail between her legs and just acts weird. I've asked my vet, she thinks it's in her head - even if it is, I don't like the way she acts after I put it on her. My vet said she'd call the manufacturer and get back to me, that was 3 weeks ago. Yes, I need a new vet but wondered if there was anything natural or foods that would naturally repel fleas and ticks. Thank you for asking.