Can you explain the treat next to my name and the votes?

When you register here, you automatically are given 1 treat. What they represent (as you get nothing for them) is explained in the FAQ:

When a question or answer is upvoted, the user who posted it will gain points, which are called Treats. These points serve as a rough measure of the community trust in that user. Various moderation tasks are gradually assigned to users based on those points.

There's more you can read about it here:

https://www.rover.com/community/faq/

Treats are given everytime you ask or answer a question in the forum, you also have the ability to vote for answer either up or down for any given question and answer. If you look at the leaderboard you will see the most active sitters in the forum based upon treats awarded. Best of luck and welcome to Rover