Getting to know your neighbours and being on a friendly basis with them is key. Greet them frequently, and let them know any time you are going to be away for several days. That way if something happens to you and they haven’t seen you around, they will come and check on you. Even better if you specifically tell them you want to be checked on if no one has seen or heard from you. I would be very surprised if there wasn’t someone to take in your little dog, but again I’d suggest you let your neighbours know your concerns.
Obviously not all neighbours are created equal, but hopefully there’ll be at least a few that you will be on friendly terms with. Since our house in Mexico stands empty for several months per year, our various neighbours keep an eye on it, one on a formal pre-arranged basis, the others informally. We are in communication from time to time - phone calls, WhatsApp, Facebook - and they let us know if there are any concerns. After the earthquake, they told us our house looks fine from the outside. We’ll see what it’s like on the inside next time we’re down. I’m expecting at minimum broken crockery, since all my dishes are on open shelves...