Chew, shot, or topical? Chew - Sentinel ( It also sterilizes fleas)
About how much do you pay for them? I think they are about $10 a month???
Do they take the chew or do you have to trick them? Trick - there is no way my girls are just going to chew them up.
Do you give it year round or just in the summer? Year round.
I read you should do bloodwork before giving the preventative in case they are already infected, is this true? Yes, when I got Mikki they tested the blood before she could start taking them. I think it cost me $60 for the test.