Really nice poster! The dog is great and in my opnion could easily be bigger to attract attention. I feel like you could improve this poster by focusing on the hierarchy of the elements. Maybe the information about the price could be bigger for instance, in a different colour and/or within a shape that stands out. Contact information can always be pretty small, because when you've reached people with your message, they will look for the details. I hope this helps. Great work!

Lovely