flea meds

hello I had a few questions. I’ve seen some posts recently about some vaccinations for flea and ticks have cause long term problems for their dogs such as seizures. Me and my spouse go camping a lot and our new puppy will be joining us when the time comes. So I'm concerned mostly about ticks...

I want to make my pup the healthiest possibly pup. First dog and he's been amazing so far and ive been training him. But to the questions: He's currently 9months, when should I change his food? And what food should i change it too? Also when should I Fix him, he's male! Also Should ive been...