I saw an ad for a free dog and I'm going to ask questions about it.
Are your questions for the owner genuine?
Yes, and I want to get a free dog.
It is okay to ask questions if you are serious about getting the dog. You want to make sure you know what you are signing up for.
I want to make sure they are truly giving the dog away and that it is healthy.
If you're truly interested in the dog, it's definitely the right thing to ask more questions to the person who placed the ad. It's important to get information about the dog, as it's a major commitment.