I have a 3 year old cat, Bo, he is a domestic short hair. I just applied this Hartz flea and tick prevention Since he likes to go hang out in the back yard. Immediately after i applied this he started twitching and then freaking out hissing and running around the house. He is finally laying down and starting to be calm. Is this a normal reaction. I used it on our other cat as well but he has hidden himself. So I am not sure if he is having a reaction.