Flea collar;;!!

Hello. This is my new friend, Yako. I was given this nice puppy on last weekend though my girlfriend was on the fence of  having it at home. In time, Yako is living with us and It’s such a chum, I do think he is a mixed retriever or labrador dog breed but I’m not fairly sure…Welll, I want to ask for one realible advice to de-flea him .. my doubt  is which is more effective for that  ,,,I was told something about parasites pipette or flea collar. Any thoughts? What I do?