i have a dog thats has been bothered by fleas pretty bad. today i gave her a flea dip with happy jacks flea dip. it seemed to help a little but shes still scratching. i then found a small tube of advantage 55 flea control i forgot i had. would it be safe to go ahead and put it on her along with the dip she just had or should i wait a few days just be safe. i just dont wont to get her sick. any help is appreciated.