Kodie got them really bad last summer.i only got bites on my legs though.theyre really small red dots that are itchy ughk i hated it.i have a scar on my arm from last summer when a flea bit me..yuck.We had to buy the expensive frontline stuff and they went away.You can buy those pills that kill fleas in 30 minutes.My vet has those,and you can buy it off Petmeds.its only around $30,and get like 12 doses.
They most likely picked up the fleas from outside or from other dogs.