fleas

[MyLilly1]

I know Lilly is too young for flea drops like advantage so I just picked up a flea collar for puppies. She will be 8 weeks on Saturday and is about 10 oz (she is a teacup chi) I would like to start her on that new chewable for heart worm prevent and fleas when she is old enough....she only goes outside to potty so i was thinking the flea collar would be enough for now.......could it make her sick or anything??